Make sure we hold WakeLock during mail sending (fixes #2180551)

* Don't runAsleep unless this is a Ping
* Relates to #2178288 in that it's possible that the system could
  sleep while we're trying to send (not sure if this is possible;
  will check), so we prevent it by holding a WakeLock in this case

Change-Id: Ib3f8786501b942e1cfcb7a0bbb07b8e3084e2a86
1 file changed