We make sure our MOZ_BUILD_DATE gets used as a source for showing date
related information on the Fenix about page.

Bug 40066: Correct conditional statement for hiding snowflake

Bug 40040: Try avoiding a race condition when starting Tor

This does not prevent the race, but this increases the chances that
the two racing operations do not happen in parallel.

Add access/mutator for bridge information.

Define enum class for tor's status and define current state using
the enums.

Correct indentation and add restartTor() function

Minor improvements

Rename localBroadcastReceiver as persistentBroadcastReceiver such that
it isn't confused with the checkIsTorStarted receiver.

Move TorController's BroadcastReceiver registration into
FenixApplication because TorController misses events when
registration is controlled by HomeFragment.

Initialize tor-android-service with FenixApplication's Context.