commit ee19f10ecc303d6c02edbbb5b0632f7b92f3d22d
author Jaewan Kim <jaewan@google.com> Tue Mar 06 15:43:25 2018 +0900
committer Sungsoo Lim <sungsoo@google.com> Wed Mar 07 16:40:21 2018 +0900
tree 64680beb1ee4308fa818cec1d89a4f59e14f9c02
parent 20e21fd7110d016ef1a8bd01e0c9e092bf9ef193

MediaSession2: Add onDataSourceMissingHelper

This allows a developer to create DataSourceDesc when the item is about
to be played. Typical example of the usages are,

    1. For a playlist consists of FileDescriptors, its developer may not
        want to open all files when MediaSession2.setPlaylist() is
        called.
    2. A controller has called setPlaylist(), addPlaylistItem(), or
        replacePlaylistItem(). Controller cannot know the
        DataSourceDesc, and only the session developer can know about
        it.

Bug: 64098437
Test: Run MediaComponents test
Change-Id: Ic109408f838405f5aec94dfba94c47ca97bc65c5