libhwc2.1: get active operation rate from kerenl when power on am: c8122475f8 am: e2fd6c48f6

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

Change-Id: Iaab8a521431d5197d852ea310791c7578a97bb61
Signed-off-by: Automerger Merge Worker <android-build-automerger-merge-worker@system.gserviceaccount.com>