Revert "Ensure keyboard is hidden when bouncer is..."

This reverts commit 8d0f687b.

Fixes: 273816675
Fixes: 273899271
Fixes: 274006564
Fixes: 263785115

Reason for revert: keyboard cannot be used in other parts of the notification shade when bouncer is hidden

Change-Id: I34d02169b342f7571cf7bf6e1caa3be5e8b7d1a7