Revert "8226: Remove unnecessary files"

This reverts commit ce9eb68fc68424fda069fd9878515781a6b9b645.

Revert "8226: regenerate makefiles after cleanup"

This reverts commit df40096da391bdd38482c1c552c99d59efb0bc7a.
8226: remove power HAL and audio_effects.conf

Change-Id: I4900aa20888bce06df56dd0c1dfd74ddff1d84be