Forward port Performance Settings from CM

	modified:   AndroidManifest.xml
	new file:   res/drawable-hdpi/ic_settings_performance.png
	new file:   res/drawable-mdpi/ic_settings_performance.png
	new file:   res/drawable-xhdpi/ic_settings_performance.png
	modified:   res/values/config.xml
	new file:   res/values/pa_arrays.xml
	modified:   res/values/pa_strings.xml
	new file:   res/xml/ioscheduler_settings.xml
	new file:   res/xml/memory_management.xml
	new file:   res/xml/performance_settings.xml
	new file:   res/xml/processor_settings.xml
	modified:   res/xml/settings_headers.xml
	modified:   src/com/android/settings/Utils.java
	new file:   src/com/android/settings/cyanogenmod/BootReceiver.java
	new file:   src/com/android/settings/cyanogenmod/IOScheduler.java
	new file:   src/com/android/settings/cyanogenmod/MemoryManagement.java
	new file:   src/com/android/settings/cyanogenmod/PerformanceSettings.java
	new file:   src/com/android/settings/cyanogenmod/Processor.java

All credits to CM

Change-Id: Iaf1e8acd613e4def5fe92b9e2445d02f6b071a39