Move MediaBrowser API into updatable media

Bug: 119539966, Bug: 119538799
Test: build and boot,
    atest CtsMediaTestCases:android.media.cts.MediaBrowserTest,
    atest CtsMediaTestCases:android.media.cts.MediaBrowserServiceTest
Change-Id: I7afed77e61506a1b4ea57ac41eee62bfcda01a74
8 files changed