PEEK [2/2]

Add ability to switch peek on or off.

PS2 - missed HEAD
PS3 - remove extraneous entry in display_settings.xml
PS4 - Gah, lots of conflicts missed in DisplaySettings.java

Signed-off-by: Carlo Savignano <stevewatersy@gmail.com>

Conflicts:
	src/com/android/settings/DisplaySettings.java

Conflicts:

	res/values-es/pa_strings.xml
	res/values/pa_strings.xml
	res/xml/display_settings.xml
	src/com/android/settings/DisplaySettings.java

Change-Id: I40c06989955af399eccc7745beaffde46ba263ed