Settings: Use new Lock screen drawable

Credit to Björn Lundén for drawables

Change-Id: Iffd6d8574448f69f876ea4ccd1f6e15d60b92982
Settings: Add Screen timeout Quick Settings Tile (1 of 2)

Change-Id: I385ef755ad7cf4a3c02dd8c7b739d5cb33aa2e90
Simplify quick pulldown summary logic and improve 'translatability'.

As word ordering on non-English languages does not necessarily match the
English word ordering, make quick pulldown summary more flexible. German
translation is included as an example for using the new functionality ;)

Change-Id: If92ab3d7a1ccc60022e79d22b5b8407bd8fb98ec

Conflicts:
	res/values-de/strings.xml