Upgrade dagger

See merge request briar/briar!973

Reference: https://github.com/tbroyer/gradle-apt-plugin/blob/6b2ee87fbf52ee09f70fb585d37e1d834da5ae3e/README.md

Avoid some unnecessary session parsing when retrieving introduction messages

See merge request briar/briar!972

[android] Show contact aliases in UI

See merge request briar/briar!971

Refactor Author.Status into dedicated AuthorInfo class and add alias

See merge request briar/briar!968

Add backend support for contact aliases

See merge request briar/briar!963

Delete Tor binaries when cleaning

See merge request briar/briar!969

Handle illegal byte sequences safely in BdfReaderImpl

Closes #1433

See merge request briar/briar!967

Add obfs4proxy and switch to obfs4 bridges

Closes #1417

See merge request briar/briar!964

to make it available in database schema migrations

Foundation for #41

[headless] Set up access manager before starting server

See merge request briar/briar!966

Support Bluetooth discovery for adding contacts

See merge request briar/briar!954

This became necesary to due an upstream change we missed when bumping
the dependency:

https://github.com/tipsy/javalin/commit/ab19ff91b7963313479779636c557770d93a5098

Log when activities start and stop

See merge request briar/briar!959