DO NOT MERGE: Revert "Media: Add MediaRouterManager to control media route of other apps"

This reverts commit 1c8188f2b40cad3dcefdcc3b7e308451bd705180.

Bug: 130511870
Test: atest android.media.cts.MediaRouterTest
Change-Id: I1de6fbeb81b1d5ef0ec4b73173b6525d4c6edc07
20 files changed