Keep checking if we are whitelisted and request it if not

* Add request for the camera

Signed-off-by: goapunk <noobie@goapunks.net>

Also fixed an issue with notifications alerting again when items
were removed.

This is the same behavior as Signal.
We might want to adjust the delay later on.

This is also introduces a new BriarNotificationBuilder as a first step
to clean up the Notification Manager code.

Closes #997

This prevents crashes, but still might cause the camera to not show up
thus preventing the user from adding contacts.

The crash happens because the serialization of recently used emoji uses
';' to separate the emojis.
One of the ASCII emojis however has a ';' in the beginning.
When this one is used by the user,
it causes an empty string to be returned when deserializing.

This commit prevents the crash by changing the separator to a tab.
It uses a different settings string to store the emoji,
so users will lose the list of recently used emoji when they update to
this version.

PS. That wasn't my idea ;)

Some devices were logging and others not, due to the log level being set in the SplashScreenActivity constructor.

This fixes a regression that was introduced in !551.

Fixes #955