Revert "BT: Multi HF support in Settings App."

This reverts commit 2cf4665d8c7930e22d6c865eca177a2c22fe3dbc.
Live Volume Steps [2/2]

Change-Id: Ie885cd895e95a1333eb5eee5d8d781eba9d6efa0

Move volume steps into separate menu

Conflicts:
	res/values/arrays_custom.xml
	res/values/strings_custom.xml

Change-Id: I88db2f82c4b7837de571cdd500402b7db3be54cb

Conflicts:

	res/values/strings_custom.xml
settings: Make mobile settings a first-class citizen

 * Nobody likes carriers, but let's not bury these settings behind
   10 layers of indirection. Many users (like me) who travel often
   will need to access these options frequently.
 * The top level switch disables mobile data.

Change-Id: I1bd4d1116a2c73832230d66c94df2c3c0aacf698