Merge "Revert "Prevent exfiltration of system files via avatar picker."" into...

Merge "Revert "Prevent exfiltration of system files via avatar picker."" into tm-dev am: 95e397a8 am: 8a0f592d am: df6c4b7a

Original change: https://googleplex-android-review.googlesource.com/c/platform/frameworks/base/+/19436694



Change-Id: I014c9a5495f3bbd962a906d185ad800dd2ae3956
Signed-off-by: Automerger Merge Worker <android-build-automerger-merge-worker@system.gserviceaccount.com>