DO NOT MERGE) MediaBrowserCompat: Fix for sending messages to a remote process

- In order to send an object via Message.obj from a process to
  a different process, the type of the object should be parcelable.
- When using Messenger, Binder.getCallingUid() in handleMessage does
  not return the uid of the calling process.

Bug: 26609825
Change-Id: I1f9ad5b46e8e174600eb432bf91e7541900b6283
3 files changed