libhwc2.1: get active operation rate from kerenl when power on am: c8122475f8 am: e08d412560

Original change: https://googleplex-android-review.googlesource.com/c/platform/hardware/google/graphics/zuma/+/23659932

Change-Id: If76e9fa03ddf1b249e963ac51b8ec909705ded0c
Signed-off-by: Automerger Merge Worker <android-build-automerger-merge-worker@system.gserviceaccount.com>