Make use of centralauth tokens for MobileFrontend photo uploads

Dependencies:
* Ia3657a5f7c9f1f0035f2b244d56995a8ed8a9cc0
* Iada82266e0108189a727c39dad9e32c6cc1c120c

Change-Id: I879ad418b0e927448994559e41a8280279661fa7
Merge "Make use of centralauth tokens for MobileFrontend photo uploads"