Layer: Guard against Region offset overflows am: 33da946835 am: f293ef1939

Original change: https://googleplex-android-review.googlesource.com/c/platform/frameworks/native/+/18887801

Change-Id: I8d09dcfc2af20bd5b58ce125d613ca20e4abf3d3
Signed-off-by: Automerger Merge Worker <android-build-automerger-merge-worker@system.gserviceaccount.com>