Merge "Merge tag 'v1.12.0' into master" am: f5461e9e83

Original change: https://android-review.googlesource.com/c/platform/external/libvpx/+/2276790

Change-Id: I38924e3079a7c99feca9c4002699d624a8f602fc
Signed-off-by: Automerger Merge Worker <android-build-automerger-merge-worker@system.gserviceaccount.com>