AudioTrack: Add Codec format change listener

Add AudioMetadata to handle codec format changes.

Test: atest AudioMetadataTest
Test: atest AudioTrackTest#testCodecFormatChangedListener
Test: atest android.media.cts.UtilsTest
Bug: 133526565
Change-Id: I2bf7c6981c75848c6af914237557da2bf10de3b1