Create C API for accessing android.graphics.Bitmap in native code.

Restrict access to SkBitmap for libandroid_runtime.so to be only within
the boundaries of the graphics module.

Test: CtsUiRenderingTestCases
Bug: 137655431
Change-Id: I4d0ea227e91d22068966513c4e3a55021b9e924f
23 files changed