Cleanup: CheckBoxes to SwitchBoxes

Also remove unwanted preferences

Change-Id: I69a1428d052f2a899be635fd9a7daa683f8989f0
Forward Port: Add option to hide AlarmClock Icon in StatusBar [2/2]

Change-Id: If538c30cfa331203ea82afe9b281faaa1d87e6f6

Conflicts:
	res/xml/settings.xml
	src/com/android/deskclock/SettingsActivity.java