* When sync threads get blocked by SSL/Socket code, we detect this
and shutdown the ClientConnectionManager, hoping this will solve
the problem.
* Apparently, this doesn't always work. The result is that syncs
are frozen until the device is rebooted (certainly) or until the
Email process is stopped and restarted (hopefully)
* This CL kills the Email process after an unsuccessful attempt to
clear blocked threads using ClientConnectionManager.shutdown()
Bug: 2615293
Change-Id: I8445b278817e508a855adeb88d6b2f969d28858b
3558e5f227