Set max length for client IDs

See merge request akwizgran/briar!762

Merge add/remove contact hooks

See merge request akwizgran/briar!761

Support multiple sets of transport keys per contact

See merge request akwizgran/briar!745

Don't reset Tor connectivity state unless we lose connectivity

Closes #1180

See merge request akwizgran/briar!756

Enable LAN plugin when providing a wifi access point

Closes #1171

See merge request akwizgran/briar!752

Shut down cleanly when phone is shutting down or memory is low

Closes #1190

See merge request akwizgran/briar!742

Looks like I added the last commit after the MR was merged.

Shorten and clean up various strings, remove empty forum warning bubble

See merge request akwizgran/briar!741

Hide UI during shutdown

See merge request akwizgran/briar!737

Add denormalised columns to messageDependencies table

See merge request akwizgran/briar!733

Add fullscreen button to QR code view

Closes #346

See merge request akwizgran/briar!734

Show different notification settings for Android O

Closes #1159

See merge request akwizgran/briar!727

Use WifiManager to get wifi network information

Closes #845

See merge request akwizgran/briar!743

Discard tasks submitted to ScheduledExecutorService during shutdown

Closes #1184

See merge request akwizgran/briar!739

This ensures we bind to the wifi interface even if it doesn't have internet access and there's another interface with internet access (e.g. mobile data).