Define new player types to describe the two types of AudioPlayer
in OpenSL ES: those with a buffer queue source, those that
play from a given URI or FD.
Add a warning in the interface description of AudioService
that changes should be reflected in the native interface too.
Test: make, NDK tests to follow
Bug: 30955183
Change-Id: I7b530ea6e3b13f238f662ce8b9612e7df574a9c5