This adds android auto support accordign to
https://developer.android.com/training/auto/messaging/index.html#messaging
However, since android auto is not officially supported in my country,
the functionality is limited. Which means that I have not been able
to fully test everything yet.
What work is:
* Message notification is shown.
* When you click on it, the message is read.
Closes#5880
1) Don't include MasterSecret in PendingIntents.
2) Correctly reply to non-push group threads, rather than
just an individual in that group.
// FREEBIE
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.