Add WRITE_EXTERNAL_STORAGE for AR module
Add WRITE_EXTERNAL_STORAGE for AR module

To save the a photo in the AR scene as user visible media.
Runtime permission should be handled by the AR library.

Bug: 126293505
Change-Id: I85042521107f16ce3e887263b8480cc2474ead19

google/iosched,google/iosched,google/iosched