am b3af6b48: Merge change 1748 into donut

Merge commit 'b3af6b4805040ea42c01765387c99089822bbe7e'

* commit 'b3af6b4805040ea42c01765387c99089822bbe7e':
  Add a tool to play all kinds of media files saved in /sdcard/media_api/samples/. It also tests the seeking functionality during the play of each sample file.