Revert "Always show emergency button on selector view screen in keyguard." ...

Revert "Always show emergency button on selector view screen in keyguard."  I'm reverting for now while we sort out the actual requirements.  Sorry for the thrash, Jaggies.  I'll handle re-adding it if needed.

This reverts commit 43c5b556

Change-Id: I2289658d3afaea9d1655b1811f49435de6c130e1