DeskClock: Make settings consistent

* Move status bar icon setting to the bottom
* Match volume button summary with shake/flip actions
* Match shake/flip actions popup with volume buttons popup setting
* Make dialog titles consistent

Change-Id: If9000bc843b0feeab40118ee00bd61fbcddf4e9a
DeskClock : If volume actions are set, always show activity

We need an upfront activity to handle the volume key presses.

Change-Id: I29ee97e13c71195532732b9f5a13e8129840a928