Merge "Rename android.media.MediaTranscodeManager -> MediaTranscodingManager" into sc-dev am: 9d0e91c7b6 am: e1906a6dc8

Original change: https://googleplex-android-review.googlesource.com/c/platform/frameworks/base/+/15521772

Change-Id: I740ee3aba3ebfb1cff6e78c367cfc00e94659aca