Mitigate the security vulnerability by sanitizing the transaction flags. am: 3ea58dbc1d am: 8b172cefcb

Original change: https://googleplex-android-review.googlesource.com/c/platform/frameworks/native/+/20886664

Change-Id: I3831739ed5fe30094f64400fc38e9c8a18cf7807
Signed-off-by: Automerger Merge Worker <android-build-automerger-merge-worker@system.gserviceaccount.com>