Revert "Clear collection after used"

This reverts commit 5ebfb3ca4776426001f3181c80cbbf9a4ba1827a.
Revert "Correct attachment type for Mms only has subject"

This reverts commit 3a8e7a5f39582022862478474e7dfdb2386ea935.
Revert "avoid IllegalStateException in MessagingNotification"

This reverts commit 79a0bb8dfc0d5363266663246a3d9c2414382baa.