Merge "File size seal for memory mapped region" into tm-dev am: c23f1b73bc

Original change: https://googleplex-android-review.googlesource.com/c/platform/frameworks/native/+/24776199

Change-Id: I8760992075ba6aa04024590f1eaf08434539a853
Signed-off-by: Automerger Merge Worker <android-build-automerger-merge-worker@system.gserviceaccount.com>