Lockscreen improvements from froyo.

(In kraken as Ide3ad839.)

	I6872c3ad135bc34348adafa76e08a3878f1b506f
	"Add emergency call button to PUK'd lockscreen."
	Bug: 2568732

	I5ad8745443fc97225af9efb938e4640cfc29b5d7
	"Restore text field used by sliding tab to give ringer
	mode feedback."
	Bug: 2587358

Change-Id: I631d8e73571ccd566dc0ad80941bd739e614b9f6