Revert "[2/2] Settings: Add lockscreen shortcuts settings"

Need to redo that in framework

This reverts commit 724c786e1a7a80cfe4b09fad337f139fd543f105.

Conflicts:
	res/values/custom_arrays.xml
	res/values/custom_strings.xml

Change-Id: Ice0f747d7891c3ddddac060f1853b022f4132986