Merge "Allow per-app opt in to use system ANGLE." into main am: dfc6953951

Original change: https://android-review.googlesource.com/c/platform/frameworks/native/+/2790062

Change-Id: I80f3507598007da8496ce466b50ad9ef312202bf
Signed-off-by: Automerger Merge Worker <android-build-automerger-merge-worker@system.gserviceaccount.com>