Revert "MediaRouter: add routing controller in MRM"

This reverts commit b3dacf3d566006ad5855c50c5772d20cb6c7e8c9.

Reason for revert: Build Fail (ab/6143227)

Change-Id: I456d1ffe4a9760e65f91c37cd67bb9e9daabcc8e
8 files changed