DeskClock: Add increasing volume option for alarm clocks

Patchset 2: Fix database, layout, code style and check alarm volume
Patchset 3: Fix string typo

Based on:
http://review.cyanogenmod.org/#/c/31623/
http://review.cyanogenmod.org/#/c/31798/

Thanks to:
Austen Dicken <cvpcsm@gmail.com> as author of original patch
Jorge Ruesga <jorge@ruesga.com> for improvements and fixes

Change-Id: I432f14d17aa8965a9267227a5ee892b6eab30caf

	modified:   res/layout/alarm_time.xml
	modified:   res/values/strings.xml
	modified:   src/com/android/deskclock/AlarmClockFragment.java
	modified:   src/com/android/deskclock/alarms/AlarmKlaxon.java
	modified:   src/com/android/deskclock/provider/Alarm.java
	modified:   src/com/android/deskclock/provider/AlarmInstance.java
	modified:   src/com/android/deskclock/provider/ClockContract.java
	modified:   src/com/android/deskclock/provider/ClockDatabaseHelper.java