This is 2nd attempt of I08e9b74192f8af1d045f1276498fa4e60d73863e.
The original CL was reverted due to conflicting with another CL submitted
before.

Here is the original commit message of reverted change.

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: Ib25bf1bb5a5191e15a6523954146521464c91906

This is 2nd attempt of 41e02e96
The difference is adding clearElementsEithLock to Font class which
is necessary to delete Fonts object outside of minikin. This method
should be removed once http://b/28119474 is fixed.

Here is original commit message of reverted change.

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
Bug: 28119474
Bug: 34378805
Test: minikin_tests has passed
Change-Id: Ice433931196f5ae79a1a7ee0c98020f914aeb5f2

This reverts commit 41e02e96.

Bug: 34378805
Change-Id: I8f1ee00b365c8b17c6140e9e286fbea082e31364

This reverts commit 90e6b188.

Bug: 34378805
Change-Id: I22b683f774813724f220b1b8584ab188f3cf4fa7

This reverts commit c4b989fc.

Test: Manually tested
Bug: 34247671
Change-Id: I0510009b2deac784770f26059681b1980800abc8

We should override the advance function only when the glyph is came
from color bitmap. This was introduced by
Ia88cb670ca9e0bb352bccef22c5ea3a789bcc1da.

Bug: 21705974
Test: ran minikin_tests
Change-Id: I3489d75ace8bffdd9035a5986a2641313feef04d

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