Keyguard: Squash undo UI changes after merge of branch 'LA.BF64.1.2.2_rb4.7'

	Revert "Hide emergency button when OOS"
	This reverts commit 5ccaaff4.

	* Buggy on MSIM, making the button perma enable.

	Revert "EmergencyCall Button on Swipe Lock Screen"
	This reverts commit 5f712cc9.

	* Introduces some ugly padding to make room for a button we have
	  disabled by default since forever.

	Revert "Emergency call button on Swipe lock Screen."
	This reverts commit f17cb289.

	* See above, adds the option to enable the button itself.

Conflicts:
	packages/SystemUI/src/com/android/systemui/statusbar/phone/KeyguardBottomAreaView.java

Change-Id: Ie95f0b075e25b625298eac3c06d278e6cb1e7b17