Merge "Fix permission of zram writeback and idle file" into main am: 640e3247 am: e4df7644

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



Change-Id: Ib858e5e0c10059cea05b4d06d4dfded5073afc60
Signed-off-by: Automerger Merge Worker <android-build-automerger-merge-worker@system.gserviceaccount.com>