Avoid having "CARD 1" or "CARD 2" as carrier name.

* Each SIM card is now bound to a unique key pair.
* Display number or slot index if display name is the same for multiple
  cards.
* Use subcription ID of last received message as default SIM, but do not
  change it if user is in conversation.
* Update app subscription IDs on new phone
* Start secure session only for SIM which received message, allow user to
  select SIM when starting a secure session

Fixes #467
Fixes #497

This reverts commit a38b372b.

TYPE_TEXT_VARIATION_VISIBLE_PASSWORD does not guarantee that password
will not leak into memory.

Fixes #614

Based on https://github.com/WhisperSystems/Signal-Android/commit/ba849bce2c90287e820a3008e9dc9a1b14de19fc
and https://github.com/WhisperSystems/Signal-Android/commit/677c7732cfda2469f9096350657c4e751a884069

Carey Metcalfe authored Jul 02, 2017 and Bastien Le Querrec committed Oct 04, 2017

This will allow the screenshots to be used in the F-Droid store.

See https://fdroid.gitlab.io/fdroid-website/docs/All_About_Descriptions_Graphics_and_Screenshots/
for more details

Ref #583

F-Droid fails to make reproductible builds with this ID.

Fixes #576

FeuRenard authored Apr 05, 2016 and Bastien Le Querrec committed Mar 29, 2017

Fixes https://github.com/WhisperSystems/Signal-Android/issues/5227
Closes https://github.com/WhisperSystems/Signal-Android/pull/5415
// FREEBIE

Upstream commit: https://github.com/WhisperSystems/Signal-Android/commit/52b1e17c368d511648b467d4a0a0710768a71a2e

Moxie Marlinspike authored Mar 15, 2017 and Bastien Le Querrec committed Mar 29, 2017

// FREEBIE

Upstream commit: https://github.com/WhisperSystems/Signal-Android/commit/9273f5cc671c5cc370549c81f435a8b694ad3e7c

Moxie Marlinspike authored Mar 08, 2017 and Bastien Le Querrec committed Mar 29, 2017

Fixes https://github.com/WhisperSystems/Signal-Android/issues/5751
Fixes https://github.com/WhisperSystems/Signal-Android/issues/6218
// FREEBIE

Upstream commit: https://github.com/WhisperSystems/Signal-Android/commit/2f46c6ca1fba65596c08bfcab24a2e47df163ef5