Merge "Fix permission of zram writeback and idle file" into main am: 640e3247

Original change: https://android-review.googlesource.com/c/platform/system/core/+/3370238



Change-Id: I662f6ebf85c8b21f6fab46c1a23bef78c6cca187
Signed-off-by: Automerger Merge Worker <android-build-automerger-merge-worker@system.gserviceaccount.com>