Merge "Add README about opt-in ABI dumps" am: 934663b2f0 am: ffbbed4edf

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

Change-Id: I516b812920d31aba61432a388495001bc34ce8af
Signed-off-by: Automerger Merge Worker <android-build-automerger-merge-worker@system.gserviceaccount.com>