Add option to Restart SystemUI to DevSettings

Change-Id: I1dd55510a878198f245ff90c011717ac5fb65f93

Conflicts:
	res/values/ok_strings.xml
	res/xml/development_prefs.xml
	src/com/android/settings/DevelopmentSettings.java

Conflicts:
	res/values/simpleaosp_strings.xml

Conflicts:
	res/values/simpleaosp_strings.xml
	res/xml/development_prefs.xml
	src/com/android/settings/DevelopmentSettings.java