Merge "Add README about opt-in ABI dumps" am: 934663b2f0

Original change: https://android-review.googlesource.com/c/platform/development/+/2537631

Change-Id: Ic7b9b3446c7290f12a565c30f3cfb1c17c7ca31a
Signed-off-by: Automerger Merge Worker <android-build-automerger-merge-worker@system.gserviceaccount.com>