Revert "hlte-common: Boom soft surround sound from Sprint Stock"

This reverts commit 78e6d3070650d2c3a470e307c34d24dac593bd2a.
Revert "[TESTING ONLY] hlte-common: Update mixer_paths.xml from stock sprint"

This reverts commit 2f8592162ab3690eed4df41b74aada5d23774f52.