Launcher2: add overflow menu in app drawer view for devices w/o a hardware menu key

  *needed by gnex to access launcher settings
  *based on http://review.cyanogenmod.com/#change,11217 by nebkat

Change-Id: I14f83b539b913cc4634fe05437427128b901202a

Conflicts:

	res/layout/apps_customize_pane.xml
	res/values/styles.xml
fix up menu strings
remove home screen lock from menu