Quiet Hours: allow disabling of system sounds (2 of 2)

* this includes touch and lockscreen sounds

Change-Id: Ib703beefbadcae225e892936e1fc9f87415703af
Merge "Quiet Hours: allow disabling of system sounds (2 of 2)" into cm-10.2
Use default button backlight brightnessk from framework overlay

Change-Id: Ib0361359a29e8030682707bf42c9fe04f780b103
Settings: QS performance profiles tile

Requires http://review.cyanogenmod.org/#/c/51776/

Patchset 2: Fix not null comparation
Patchset 3: Added suggestions
Patchset 4: Fix string
Patchset 5: Rebased
Patchset 6: Rebased
            Move setCurrentValue() inside mPerfProfilePref null check

Change-Id: I578d84002b00e0a7c58cdcaf2a3735bf6bbfdabf
Signed-off-by: Jorge Ruesga <jorge@ruesga.com>
Merge "Settings: QS performance profiles tile" into cm-10.2
Revert "QS performance profiles tile [2/2]"

This reverts commit 13fcd7c3ddc81794589d9a364fd0dd46ef46e30b.
merge changes from CyanogenMod 10.2 into local branch

Conflicts:
	res/values/cm_arrays.xml
	src/com/android/settings/cyanogenmod/PerformanceSettings.java

Change-Id: If2a6504aa5999e369d4aca76ba33c538804834a0