Remove background cpuset setting am: 5f600515e7 am: 1e7c5703aa

Original change: https://googleplex-android-review.googlesource.com/c/device/google/lynx/+/22953955

Change-Id: Iaf0a38071042fbd7e52519271e15e132694c7780
Signed-off-by: Automerger Merge Worker <[email protected]>