Don't recycle messages by default.

* Don't delete old messages by default.
* If any of the conversation threads have more messages than
  the storage limit settings, an activity is shown that will
  tell the user how to turn on the storage limits.
* This changes the behavior introduced in commit
  f766f33b774cfb6dd4100a6522ffa23c0a0dae35

Change-Id: I7e20ec73fbe42e19397cda2663de7434557f0e51
Nuke the 'vibrate during call' option.

It has never worked anyway, as NotificationManagerService prevented the
vibration on a lower level.

Change-Id: I5192d841796d3a2e1a447140eb26096b09aaec2d