1) Move all the crypto classes from securesms.crypto.
2) Move all the crypto storage from securesms.database.keys
3) Replace the old imported BC code with spongycastle.
1) Refactor the master secret reset logic to properly interact with
services.
2) Add support for "BigText" and "Inbox" style notifications.
3) Decrypt message bodies when unlocked, display 'encrypted' when
locked.