Fix condition where FP would require confirmation

Adds IconController#deactivate to allow clean transfer of view
ownership. Now we deactivate the face IconController once we know we
need to animate to the fingerprint state, and use the fingerprint
IconController to display subsequent animations.

This also fixes a hidden issue where the face IconController was
leaking (pulsing logic keeps running) even after BP is dismissed.

Bug: 194351208
Test: manual, for requireConfirmation=true and requireConfirmation=false
Test: atest com.android.systemui.biometrics

Change-Id: Iefd3df7a8706ce9213109862d509235a74aa8099