Rewrite the PowerAdvisor using standard power wrappers and clean up

* Replace custom AIDL/HIDL wrappers with libpowermanager
* Remove early hint code as it is deprecated for load change hints

Bug: b/245975645
Bug: b/244358432
Test: atest libsurfaceflinger_unittest

Change-Id: I2a11779ce1f78bcf29ea0e7978cb8933e74e9f7b
Merged-In: I2a11779ce1f78bcf29ea0e7978cb8933e74e9f7b
(cherry picked from commit cbfe23c938226f5fa83d9b37f9f4212ee0c65a6f)