Wear notification-only samples: Remove :Wearable dependency

Removes dependencies on :Wearable module (via settings.gradle or teamplate-params.xml)
on Wear samples that don't have a watch-side app.

Affected samples:
- ElizaChat
- RecipeAssistant

Change-Id: I0f6f3a3510a872cfeab841b8bef7a2a425ec2cee