Move illegal state detection in stub classes to warning

In order to increase stability, move *ImplBase listeners to warning for
now until we can find the source of the error.

Fixes: 179217608
Test: manual; kill phone process
Merged-In: If1813ed6c82b778018d61691018604b6891ff34e
Change-Id: If1813ed6c82b778018d61691018604b6891ff34e