Merge "Add FAQ about header ABI checker" into main am: 7e2c49eff3

Original change: https://android-review.googlesource.com/c/platform/development/+/2909188

Change-Id: Ib5eba6e1ce06a9957e19d532ec53512b1bcca9aa
Signed-off-by: Automerger Merge Worker <android-build-automerger-merge-worker@system.gserviceaccount.com>