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
Also bootstrap unit tests for PointerController. Need to mark 3
functions of SpriteController virtual so their behaviors can be
overridden.
Bug: 130822623
Test: SurfaceFlinger can get cursor type and hotspot.
Change-Id: I739cd03214364144bb4e22a166ecc7abfd3492fe