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

Currently translated at 100.0% (615 of 615 strings)

Translation: Silence/Silence-Android
Translate-URL: https://translate.silence.dev/projects/silence/silence-android/zh_Hans/

Currently translated at 100.0% (3 of 3 strings)

Translation: Silence/Distribution
Translate-URL: https://translate.silence.dev/projects/silence/distribution/zh_Hans/

Currently translated at 100.0% (615 of 615 strings)

Translation: Silence/Silence-Android
Translate-URL: https://translate.silence.dev/projects/silence/silence-android/fr/

Moxie Marlinspike authored Dec 01, 2017 and Bastien Le Querrec committed Aug 26, 2019

Fixes https://github.com/WhisperSystems/Signal-Android/issues/7237

Upstream commit: https://github.com/WhisperSystems/Signal-Android/commit/4cb2ac7b27e7b170a9102af638b98b86e589bc9d

Currently translated at 92.0% (562 of 611 strings)

Translation: Silence/Silence-Android
Translate-URL: https://translate.silence.dev/projects/silence/silence-android/ar/

It will allow to push updates on the Google Play now.

Greyson Parrelli authored Aug 06, 2018 and Bastien Le Querrec committed Aug 26, 2019

Bucket our notifications into channels. Required to target API 26.

Upstream commit: https://github.com/WhisperSystems/Signal-Android/commit/dbd42c4af2a95feb9a1bc45ca352e4c122157d0f

Fixes #489

Greyson Parrelli authored Aug 21, 2018 and Bastien Le Querrec committed Aug 26, 2019

Required for the API 26 migration.

See https://developer.android.com/about/versions/oreo/android-8.0-changes#ccn

Upstream commit: https://github.com/WhisperSystems/Signal-Android/commit/c3bdc48ee38007a92583739d833b64edc57f8529

Fixes #762

Currently translated at 100.0% (612 of 612 strings)

Translation: Silence/Silence-Android
Translate-URL: https://translate.silence.dev/projects/silence/silence-android/fr/

Currently translated at 96.1% (588 of 612 strings)

Translation: Silence/Silence-Android
Translate-URL: https://translate.silence.dev/projects/silence/silence-android/de/

Currently translated at 92.0% (563 of 612 strings)

Translation: Silence/Silence-Android
Translate-URL: https://translate.silence.dev/projects/silence/silence-android/ar/

This will slow down decryption after entering passphrase, but it will
improve security.