Merge "Make sure we check for valid GrContext when pinning images." into...

Merge "Make sure we check for valid GrContext when pinning images." into sc-dev am: 351080a8 am: 8886211d

Original change: https://googleplex-android-review.googlesource.com/c/platform/frameworks/base/+/15156074

Change-Id: I412e814e2dd1d49ed45daad72500b730454ee547