Revert "Revert "audio: libaudioamp: add hooks to open/close for amplifier init""

This reverts commit d29144f22c0269ae223db8fb3545962526e0a0c9.

Change-Id: Ia1434020a8719002a6a0096a0661b628ed400ca3
Merge remote-tracking branch 'upstream/cm-10.2' into cm-10.2