Revert "Reset dismissAction and notifyCancel dismissCallbacks when altBouncer removed"

Bug: 351712715

This reverts commit 48bb658f.

Reason for revert: Causing dismiss action to be cleared when going from fingerprint to pin/pattern auth.

Change-Id: I87ba6a8814a65ffd3ac2eabc59b3bbdc58c0e4e1