AOD: Fix RemoteInput from dozing

Launching remote input from doze was broken because:
- We reset the keyguard, calling showKeyguard and clearing the states when stopping to doze
- updateIsKeyguard cleared the state; instead clear it now when we actually show / hide the keyguard

Change-Id: I901908d96ba93a49e4104b622bdd5ca604a8e392
Fixes: 64335172
Test: Receive message on AOD2, click Reply, verify it opens reply box