Skia's SkCanvas::SaveFlags are being deprecated. This CL introduces
the equivalent android::SaveFlags, converts all internal clients to
the new enum, and switches the saveLayer glue to the
SaveLayerRec-based API.
Change-Id: Icb1785f4e7c0f652b1f04b34a1e3ccb063c408f3
Now test-only common files reside in tests/common, and each test
executable type (macrobench, microbench, and unit) has a subdir there.
This change means the shared lib no longer has test code in it, and
sets up a means for scenes to be shared between tests.
Change-Id: I37b081f6977300e03fdd961b8e6439fde730605e
