Make Fragment resource files private
Make Fragment resource files private

By default, if no resources are declared public, all of them are
considered public. None of the resources in fragment should be public.

Adding an empty public tag to ensure our resources remain private.

Test: ./gradlew checkApi tested in sample app
Change-Id: I3f918cc9cee37f50471177b7dcf5a7b194dff2f4

AndroidX/androidx,AndroidX/androidx,AndroidX/androidx,androidx/androidx,AndroidX/androidx,AndroidX/androidx,androidx/androidx,androidx/androidx,androidx/androidx,AndroidX/androidx,AndroidX/androidx,androidx/androidx,androidx/androidx,androidx/androidx,AndroidX/androidx,androidx/androidx,androidx/androidx,AndroidX/androidx,androidx/androidx,AndroidX/androidx