Prevent exfiltration of system files via avatar picker. am: 5981e18eb5 am: 9fa90eb683 am: 97b62f44cd am: 23af1786bb am: 5f0164c875 am: e9a523711a am: efe9ce6c0b am: 5482a72480 am: 2ed8e97186 am: e20e723b19

Original change: https://googleplex-android-review.googlesource.com/c/platform/packages/apps/EmergencyInfo/+/19755176

Change-Id: Ic30eee643c13f9c4130c57e2f52b525cacd2b205
Signed-off-by: Automerger Merge Worker <android-build-automerger-merge-worker@system.gserviceaccount.com>