Merge "adds LO_FLAGS_AUTOCLEAR for loop device of zram backing device" am: af09c15049 am: d50f25bed6 am: d23803f00a

Original change: https://android-review.googlesource.com/c/platform/system/core/+/1834393

Change-Id: Icbf141a0e5a6ba4ca78da0639a779ad9a86c707a