Re-add link to DeviceParts.

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

(cherry picked from commit ce6cdfcdbb3e75dfcbf5902dd47878b0a5d5e955)

Change-Id: I19e71cae94d1553010d8678f3b412f7bf510620e

Conflicts:
	res/xml/more_device_settings.xml
	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