Settings: Use hardware acceleration for selected applications (2/4)

Move HW Rendering app to System/Performance section

Allows controlling of HW rendering individually for any application.
This is usefull for applications having the "blank white screen"
bug (gmail, facebook, ...). Turning off HW rendering for these application
eliminates the white screen bug. As a side effect, the application UI
will become more laggy - feels like in gingerbread.

Conflicts:
	src/com/android/settings/cyanogenmod/PerformanceSettings.java

Change-Id: I8102de1e4e575d4b537676b91d66320a05f51b18

Conflicts:
	src/com/android/settings/cyanogenmod/PerformanceSettings.java
Re-add link to DeviceParts.

Conflicts:
	src/com/android/settings/cyanogenmod/MoreDeviceSettings.java

(cherry picked from commit ce6cdfcdbb3e75dfcbf5902dd47878b0a5d5e955)

Change-Id: I19e71cae94d1553010d8678f3b412f7bf510620e

Conflicts:
	src/com/android/settings/cyanogenmod/MoreDeviceSettings.java
Performance: add swap, swap priority preferences

Utilizes two properties to control swap:
* persist.sys.swap (0, 1; activation)
* persist.sys.swap_pri (0, 2; the actual priority that will be used)

Change-Id: I60a195de279a6e5f786658945e554cc957af9031