Add meta data extensions to support APE playback

To support APE playback, our APE decoder requires 2 parameters
"first_byte" and "curr_frame" to decode APE frame.

Bug: 143118093
Test: We test APE playback with our extractor and decoder and
it can work normally when it seeks during APE playback.
Change-Id: I47b83252187206a1660b63fe68396997869546c8
1 file changed