Merge "Prevent exfiltration of system files via user image settings." into qt-dev am: 74ff164972

Original change: https://googleplex-android-review.googlesource.com/c/platform/packages/apps/Settings/+/17003629

Change-Id: I5ebae8947d883130b93c9a82d087656dab41498a
Signed-off-by: Automerger Merge Worker <android-build-automerger-merge-worker@system.gserviceaccount.com>