sepolicy: Add sched_pelt_multiplier node to proc_sched am: 7b1dcc7981

Original change: https://googleplex-android-review.googlesource.com/c/device/google/gs-common/+/23978118

Change-Id: I6054be8c4f7c20bf259258fcf346fb1220fc0801
Signed-off-by: Automerger Merge Worker <android-build-automerger-merge-worker@system.gserviceaccount.com>