Permissions for 3rd Party Apps

This commit adds a permissions,
"net.somethingdreadful.MAL.permissions.UPDATE_MEDIA", that 3rd party
apps must request in order to use Atarashii to update MyAnimeList
through Atarashii. Also a permission group, .USE_ATARASHII for
.UPDATE_MEDIA and any future permissions we might add for services we
extend to third parties.

Also: In handling support this way, we can attract users by having only
one app handle their MAL account, as well as creating a
developer-friendly way to easily integrate MAL - through Atarashii!.
Dummy implementation of UpdateReceiver

Added a dummy implementation of UpdateReceiver to test sending a
broadcast from another app.
BroadcastReciever now recieves properly

Fixed a typo in the manifest for the permission it requires that
prevented it from working. Amazing the difference a single "s" makes.