Merge "Allow per-app opt in to use system ANGLE." into udc-qpr-dev am: 5d2d19c538

Original change: https://googleplex-android-review.googlesource.com/c/platform/frameworks/native/+/23768276

Change-Id: I9ce09e09c58c7ceb487639b36ddfd6e42c5de3fb
Signed-off-by: Automerger Merge Worker <android-build-automerger-merge-worker@system.gserviceaccount.com>