Upgrade jimfs to v1.2. am: 047cfe3604 am: 44bee9650f am: 6e5c098a23

Original change: https://android-review.googlesource.com/c/platform/external/jimfs/+/2283353

Change-Id: I6c338dc10df90c604682827b333be4edbfe9a95c
Signed-off-by: Automerger Merge Worker <android-build-automerger-merge-worker@system.gserviceaccount.com>