Always request to hide IME when bouncer was showing

Don't conditionally hide the IME based on the current insets state.
A race condition existed where rapid calls to show and then hide IME
would result in the IME staying visible.

There is no downside to requesting to hide IME if it is not visible.

Fixes: 428708975
Test: manual - rapidly show/hide password bouncer and check for IME
remaining on lockscreen
Flag: EXEMPT bugfix

Change-Id: Ibb665563158e3dc3b092b9821fb4dcdeca879573