Daniel Bonnevier 56a9a6631a Add key for sample rate and bits per sample
Add new keys for sample rate and bits per sample.
This makes it possible to indicate the specification of
the music files on application.

Bug: 112986969
Test: Check if sample rate and bits per sample can be retrieved

Change-Id: Ie5a90800297a0a7c2dd6f3a2bdf9e88c9221bee1
2018-11-02 19:49:48 +09:00
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