This lays the groundwork for variation settings support.
Since we should regard different variations of a font as different fonts, we
need to create new typefaces. To reuse the same instance of MinikinFont, as
much as possible, FontFamily::createFamilyWithVariation now reuses an
existence instance, while incrementing the reference count.

Test: minikin_tests
Bug: 33062398
Change-Id: I08e9b74192f8af1d045f1276498fa4e60d73863e

This lays the groundwork for making SparseBitSet serializable.
FontFamily.addFont is only used when the FontFamily is constructed.
Thus, instead of calling FontFamily.addFont multiple time, passes
Font list to the constructor. By this change, FontFamily can be
immutable now.

By making FontFamily immutable, We can create FontFamily with
pre-calculated SparseBitSet.

Bug: 34042446
Test: minikin_tests has passed
Change-Id: I2576789fba6cb27687e920e2488e8bedbcf7d36f

GraphemeBreak.tailoring/GraphemeBreak.genderBalancedEmoji start failing
after ICU update to 58. The failure is around Rule GB9 in Unicode Standard
Annex #29. GB9 forbids breaks before extending characters and before ZWJ.
However the implementation in minikin only checks for extending characters.
It used to work with Unicode 8.0 since ZWJ had the Grapheme_Cluster_Break
property of Extend in Unicode 8.0 but it no longer has that property in
Uniocde 9.0.
Thus, we need to check for ZWJ explicitly.

At the same time, this removes manually added PREPEND characters case from
tailoredGraphemeClusterBreak which is already supported in ICU 58.

Test: minikin_tests passes
Bug: 34117643
Change-Id: Ib46d48bebe4a866208e050d7defc715c61fcbeb1

To avoid lock contention in Skia, use HarfBuzz implementation
for retrieving boundary box and advance information from font.

Bug: 21705974
Test: Manually done

Change-Id: Ia88cb670ca9e0bb352bccef22c5ea3a789bcc1da

Test: compile
Bug: 30465923
Change-Id: I9bcbf910e90a9160ed2fd2f75c5d72dba6ad6fcf

am: cefa7dfd

Change-Id: Ia4f4b30a4466a007c15f7606485611db9b168056

am: 585b3720

Change-Id: I228e76e2fffcab14996e38f19687e393985e2da0

am: 39ab4011

Change-Id: Ia5fd49e48b3223a708739782d6694d63d2932e48

Use log/log.h to harden code against liblog changes.

Test: compile
Bug: 30465923
Change-Id: I3dea82e76d28d9ef52d7c0f11e038c4298863eb9

Since switching to 64-bit devices, size_t is now a 64-bit integer.
FontCollection::Range uses two size_t integers but they just point to an index
in mFamilies. To reduce the memory usage, this CL changes the size_t integers to
uint8_t.

The maximum size of each integer in Range is the size of FontCollection::mFamilies.
The largest this can go is the system font list plus a user defined family, which
has 91 families. So an 8-bit integer should be enough.

With this change, about 84 KiB of memory will be saved per font collection. Since
eight font collections are created during bootstrap, about 670 KiB of memory will
be saved with this CL.

Bug: 33562608
Test: Ran FontCollection.collectionAllocationSizeTest on a 64-bit device.
      On my Nexus 5X, it changed from 327358 to 241342.

Change-Id: I9e01d237c9adcb05e200932401cb1a4780049f86

Add an "mJustified" for justification, and tune the line breaking to
produce good results. Major differences for fully justified text include:
- Space can be shrunk in justified text.
- Hyphenation should be more aggressive in justified text.

Also adds a penalty for the last line being very short. This is tuned
to be more aggressive for ragged right than for justified text.

This is based on a patch by Raph Levien (raph@google.com).

Bug: 31707212
Test: Manually tested with Icbfab2faa11a6a0b52e6f0a77a9c9b5ef6e191da
Change-Id: If366f82800831ccc247ec07b7bc28ca4c6ae0ed6

Test: build
Bug: 26552300
Bug: 31289077
Change-Id: I6181ae7e84f9bdcbed50841c70d07f6906a10eb7

am: debbbc81

Change-Id: I97e1031fbf52cac46997e55444918d7c43abeb75

am: c95a4089

Change-Id: Ie77d0b3e90aeafeef05b427750c04d5589a340dc

am: 555d84c6

Change-Id: I9bb9b1afaa27c1d5924c6d3888861dea1ff3c18b

- replace cutils/log.h with android/log.h (main buffer logging)
- replace cutils/log.h with log.log.h (+SafetyNet logging)
- define LOG_TAG before use.

Test: compile
Bug: 26552300
Bug: 31289077
Change-Id: I7a4803dd66f31b7103e09e5ff5b8fa523fa0fd60

am: 512defc2  -s ours

Change-Id: I802c851e0518533a0c845483dc94b603c60c328a

am: 3aca9aee

Change-Id: I3d7dd7c58c544e90176f25cac568c10facce726b

am: 2344eecf

Change-Id: Ie02fbdc89e59707c899175dadb9700a4873f8010

am: 068eab8f

Change-Id: I09c27394d95417a0bb8b0ee8a48580e6e88dc8c6

This will handle installation for local builds as well as for the test
bundles.

Test: m -j minikin_tests; ls $OUT/data/nativetest*/minikin_tests
Test: m -j continous_native_tests dist; zipinfo -1 out/dist/*continuous_native_tests*.zip
Test: /data/nativetest{,64}/minikin_tests/minikin_tests
Change-Id: Iafd31fa119e7c4d92937ca8ae8346e268a6c1f38
Merged-In: Iafd31fa119e7c4d92937ca8ae8346e268a6c1f38

This will handle installation for local builds as well as for the test
bundles.

Test: m -j minikin_tests; ls $OUT/data/nativetest*/minikin_tests
Test: m -j continous_native_tests dist; zipinfo -1 out/dist/*continuous_native_tests*.zip
Test: /data/nativetest{,64}/minikin_tests/minikin_tests
Change-Id: Iafd31fa119e7c4d92937ca8ae8346e268a6c1f38

am: 50fbc9db

Change-Id: I0d13d864021b47eed3ee730fb09783044423ecd4

am: 03a64791

Change-Id: I5bd69940f0e495119dd6154fb9e1efe34fa9a062

am: 930de265

Change-Id: I1e38ef5ae3a4d6a977df856abbb160b2e5fcde4e

am: c4b8bdc4

Change-Id: I0aac6741d2c92bbe46fdf89931460fbb41acc1ea

Change language score calculation in the calculation of the font family.
Instead of language and script matching, a match in subtag is added.
In addition, a match in subtag has a higher priority than a match in
script. The score levels are divided into 5 score levels and the limit
of the number of font languages is changed to 12 from 17. Multiple
languages selection rule could to be added in the future.

Bug: 31608997
Test: Done by unittests.
Change-Id: I1e7177095f604fd1794bc99ca36c705dcb4c56e7

minikin_tests was copying its test data to
$OUT/data/DATA/nativetest/minikin_test, and then packaging that with
LOCAL_PICKUP_FILES=$OUT/data/DATA, which would also pick up anything
any other module copyied to $OUT/data/DATA.  $OUT/data/DATA isn't
where the tests expect to find their data, they look in
/data/nativetest/minikin_test.  Copy the files to the intermediates
directory instead.

A future change will install LOCAL_PICKUP_FILES for local builds
to the correct place, so adb sync and
adb shell /data/nativetest/minikin_tests/minikin_tests will run the
tests.

Test: mma -j
Change-Id: I808ce743f51e5ccac711e22821e7e0d7cd94ffdf

Test: none
Change-Id: I9115c41f1699ab5d9d677251d96ea8f4fb844845

Parse Emoji subtag and store into 4 different styles: default, text,
color and empty. Replace hasEmojiFlag function with getEmojiStyle to
get effective status according to script and subtag. However, score
calculation for the font selection needs to be completed in the next
stage. No performance regression is observed with this CL.

Bug: 31608997
Test: Done by unittests.
Change-Id: I923243641c946248dd5a0aa9fb9c940515310d34

This is 2nd attempt of Ifcd7a348d7fb5af081192899dbcdfc7fb4eebbf9

After Id766ab16a8d342bf7322a90e076e801271d527d4, GetTable is no longer
used in production due to poor performance and it is now only used in
tests. This CL removes GetTable interface from MinikinFont and update
tests code to use new interfaces, GetFontData, GetFontSize and
GetFontIndex.

Bug: 27860101
Test: Manually done
Change-Id: Ib48973ff25cdc61a4c666d28128266df0aaea83e