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

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

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

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

This wasn't as simple as changing the persona in the XML,
because the same layout is used for a post whether reblogged or not.
So the persona needs to be changed programmatically for reblogged posts.
For this, the `AuthorView#setPersona()` method has been made public and
was changed to always set all views into the desired state to support
usage in a RecyclerView.

* remove the forced hiding in ThreadListActivity as it should no longer be required

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