VIMS: Decouple recognizer init from interactor in PackageMonitor.

On package modification, set the recognizer independently of the
interactor.
This will allow keeping the default recognizer provider a different
package from the interactor.
There should be no change to how the interactor is set.

Bug: 167597525
Test: manual
Test: atest CtsVoiceInteractionTestCases
Change-Id: Ib24f077365cbb0850c61196c2825737db1c1c090