On platforms (API >= 11) that support receiving click events within
a notification, we change the notification format so that users
can "lock" TextSecure with a click.
For all platforms, we change the notification icon in the status
bar from a "lock" to an "unlock," to better reflect the situation.
This is all part of the master plan for eliminating the passphrase
timeout option.
1. New look for quick contact badges.
2. No more unread indicator, replace with bolded text.
3. Style message count with color rather than parens.
4. Remove "New Message" item, add as item in action bar instead.
