Ensure that we destroy view before adding another

Whenever a blueprint is propagated, which happens every time the
configuration changes (rotations, etc), the preview renderer is adding a
udfps view and smartspace view and not removing the previous one.

1. Only inflate udfps view once. It does not rely on the blueprint
   framework and can be moved outside of the view binder.
2. Remove smartspace view if it is not null.

Test: add logs to onattach and ondetach to smartspace and change
blueprints via adb.
Fixes: 308353286
Flag: NONE

Change-Id: Iefb240697b940417d84e7dbdf7d9e1488ecc03ba