Fix permission request when downloading images to external storage.
Fix permission request when downloading images to external storage.

It was HockeyApp's fault.

Bug: T195617
Change-Id: Ie4bc998bf0e6c2ca783f1686d6391a831c6cb78f

dbrant/apps-android-wikipedia,wikimedia/apps-android-wikipedia,wikimedia/apps-android-wikipedia,wikimedia/apps-android-wikipedia,dbrant/apps-android-wikipedia,wikimedia/apps-android-wikipedia,dbrant/apps-android-wikipedia,dbrant/apps-android-wikipedia,dbrant/apps-android-wikipedia