and a corresponding method for fragments that calls through to the activity.
For now, the method just finishes the activity
and NavDrawerActivity overrides it to do nothing,
and all the error places marked with TODO that finish the activity call the method instead.

That gives us zero functional improvement over the status quo,
but it allows us to change the default behaviour easily,
and then we can start thinking about which cases should have non-default behaviour.

and use the primary color for the notification.

* Ignore results until the KeyAgreementTask is ready and returned the local payload

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

This also removes the BriarFragmentActivity that was only really used by
the NavDrawerActivity.

The toolbar subtitle shows information about how many contacts the
current blog is shared with and how many of those are online.

* Remove distinction between "shared with" and "shared by"
* Show all contacts a blog is shared with
* Show online status of contacts in sharing screen