Sync precompilation updates from upstream Skia

Pulls in changes to
external/skia/tests/graphite/precompile/AndroidPrecompileTest.cpp
from http://review.skia.org/1003137 through
http://review.skia.org/1008376 (inclusive)

Upstream author credit:  Robert Phillips <robertphillips@google.com>

Bug: b/380159947
Bug: b/422805521
Test: comparison of compilation results
Flag: com.android.graphics.surfaceflinger.flags.graphite_renderengine
Change-Id: I69b5d770dd198fb66364f0d2012a7f8c3454f597