Add updatable_media_stub to framework

The module framework is now a build-only library whose purpose is to
provide hidden APIs from the non-updatable part of the platform and APIs
from the modules. Merging updatable_media_stub to framework, like the
stub libraries from other modules.

Bug: N/A
Test: m
Change-Id: Ib627523aab44b7c41d27d70c6ae34cda5dc2e27c