Settings: Add support to enable/disable Electron Beam (2/2)

Change-Id: I71df734408bda58b0b61ac6f77407786f8c450c3

Conflicts:
	src/com/android/settings/DisplaySettings.java
Lockscreen: Widget toggle

Change-Id: I80470094af5729b0aa6741e4334505fbbf8e8060

Conflicts:
	res/values-zh-rCN/pa_strings.xml
	res/values/pa_strings.xml
	res/xml/lock_screen_settings.xml
	src/com/android/settings/paranoid/Lockscreen.java