Revert "Delete the cuttlefish power HAL."

This reverts commit c6a444c4ce71547c72232eeb78100417548456f8.

We need the legacy HAL because the default implementation in AOSP master
is just a pass-through wrapper around the original implementation.

Bug: 134696936
Change-Id: I0dfd2c8da210758b6dcfab6c4db92426eb1e2bd5
Merged-In: I0dfd2c8da210758b6dcfab6c4db92426eb1e2bd5
1 file changed