Revert "Revert "Reland "Run Flutter on iOS and Android with color correct Skia (#3826)" (#3878)" (#3895)

This reverts commit 1db18a40.

This reverts commit 2d9155e1.

Fixes a regression with semitransparent images (flutter/flutter#11169)

* Revert "Revert "Reland "Run Flutter on iOS and Android with color correct Skia" (#3818)" (#3823)"

This reverts commit db8d8a99.

* Fix test code to match internal API change

This reverts commit 2650f529.

* Revert "Revert "Run Flutter on iOS and Android with color correct Skia (#3743)" (#3775)"

This reverts commit cfe70e07.

* Enable sRGB on IO thread, too

* Add 4444 as a fallback rendering mode

* Use bare ptr to SkColorSpace (not sk_sp) in PrerollContext

This reverts commit ffe8181f.

* Run Flutter on iOS and Android with color correct Skia (#3716)

***Turns on color correct rendering for Android and iOS
***Communicates dst color space to raster cache
***Turns on color space aware image decoding

Test:
***color_testing_demo on Pixel XL
***flutter_gallery on iPad Mini and iPad Pro (haven't figured out how to run manual_tests on iOS)

TODO:
I needed to split up this CL somewhere. These are follow-up tasks.
***Make desktop backends color correct
***Make debugging tools (ex: encoding frames to png) preserve color space
***Investigate using UIKit API to allow iOS to fine tune color space of rendered content

***Turns on color correct rendering for Android and iOS
***Communicates dst color space to raster cache
***Turns on color space aware image decoding

Test:
***color_testing_demo on Pixel XL
***flutter_gallery on iPad Mini and iPad Pro (haven't figured out how to run manual_tests on iOS)

TODO:
I needed to split up this CL somewhere. These are follow-up tasks.
***Make desktop backends color correct
***Make debugging tools (ex: encoding frames to png) preserve color space
***Investigate using UIKit API to allow iOS to fine tune color space of rendered content

We are removing some indirect includes from SkCanvas.h.

Updating clients to pull required headers explicitly.

I had added this initially as a means of making it easier to deal with OpenGL directly in Flow. However, we are moving away from dealing with the client rendering APIs directly. Instead, delegating everything to Skia. Besides, we only ever used this to log the GPU description in case of context setup failures. This has not proved to be useful so far. Also, having this in place is making it difficult to remove all dependencies on GL in Shell.

The GPUSurfaceGL holds references to Skia objects that may own GL objects.
If the GL objects are destructed on the GPU thread after the EGL context has been
dropped, then the GL delete calls will not take effect.

Detach the EGL surface from the GPU thread and then destroy it during the FlutterView surfaceDestroyed callback (#3316)

Fixes https://github.com/flutter/flutter/issues/7147

* Update Skia revision to pull in GL native interface construction fixes on iOS.

Fixed in https://skia-review.googlesource.com/c/5212/

* Use the new image encoder API from Skia.

Extract a common interface out of GaneshCanvas (into GPUCanvas) that can also be used for the Vulkan canvas. (#3058)

* Namespaces have been updated to reflect the move from //flutter/sky/shell to //flutter/shell.
* shell/BUILD.gn file has been split into smaller GN files for each subcomponent of the shell (common, GPU, diagnostic, testing).
* GN dependencies have been rewritten to stop exposing common shell dependencies as public. Duplicates have also been removed.
* GPU subcomponent has been updated make it more suitable for Vulkan integration.
* The GLFW backend has been resurrected.

Example:
  JavaClass dateFormatClass = Java.getClass('java.text.SimpleDateFormat');
  JavaObject format = dateFormatClass.newInstance('yyyy.MM.dd');
  print(format.parse('2016.01.01').getYear());

* Conversion of all primitive types, wrapped Java objects, and nulls between Dart and Java
* A way to distinguish float arguments from doubles when calling Java methods
* Construction of a Dart JniClass from a Java class object

Also adopt a standard pattern for handling exceptions in JNI APIs

This also extends DartClassLibrary to support multiple DartClassProviders
for different libraries