Revert "Bug 806374 - Don't store phone's wallpaper or the dialer ringtone or the notification ringtone as a data: URI r=vingtetun"

This reverts commit 996244ec35d2d151a1ae5ac4e17ea0ffcdde8aa0.
Merge pull request #11285 from lightsofapollo/revert-unit-test-bustage

Revert "Bug 806374 - Don't store phone's wallpaper or the dialer rington...