Revert "speech: Update recognition-service resource"

This reverts commit 98f6ac3c.

Reason for revert: Changing the approach - instead of a resource attribute that can be set in a manifest, a public method returning the same value will be available to be overridden.

The method will be added in ag/20063753.

Change-Id: Ie4a7a633377b0b3c624743f48b9c637f788e9093