Performance: Allow enabling KSM by default

Allow device maintainers to enable KSM by default.
Set ro.ksm.default=1 to enable.

Change-Id: Ib432be4937dff63891e641b2f14ab223c2d245df

Conflicts:
	src/com/android/settings/cyanogenmod/MemoryManagement.java
[2/3]Quiet Hours

Squash commit from:
 Quiet Hours (2/2) thanks cm

slimrom mods && omni adaptation

PS3: fix class paths
PS4: clean up :P
PS5: Google dialer check
PS6: Don't remove ringer mute option, just disable it

Change-Id: I9ca1894f3d2a7a949082e97ba7e959d018495896

Conflicts:
	AndroidManifest.xml
	src/com/android/settings/Settings.java
zh-rCN: update translation

Change-Id: Icadba829e2d6a77f369251a2163c1ec7a90716de