Add fastscroll to the Manage applications screen

so you don't need to scroll so much if you have alot of apps
and want to go to the bottom of the list.

Change-Id: I96d892abf53a9da784ae1df056558d4fd3cf64f6
Merge "Add fastscroll to the Manage applications screen" into kitkat
Move volume adjust sound option to more native place (2/2).

Our new UX concept includes saving more settings headers possible.
Move this into Volumes settings fragment. Also update description string.

PS2: Update description string.

Signed-off-by: Carlo Savignano <stevewatersy@gmail.com>

Change-Id: I6243e27582dd0099da4b3b12b30a4e5cb8247dac
Merge "Move volume adjust sound option to more native place (2/2)." into kitkat
Merge remote-tracking branch 'PA-settings/kitkat' into kitkat-remix

Conflicts:
	src/com/android/settings/SoundSettings.java