Merge "authfs: support multiple threads" am: 377602e35a am: 843af3feff am: 7e1ba56ac6

Original change: https://android-review.googlesource.com/c/platform/packages/modules/Virtualization/+/2056403

Change-Id: I6e8fcf13114bd953c69dcb48b2502e49c69620f3
Signed-off-by: Automerger Merge Worker <android-build-automerger-merge-worker@system.gserviceaccount.com>