Merge "Adding FileSystemUtilsTests to postsubmit" into main am: bd161c547e am: d00c53bb08

Original change: https://android-review.googlesource.com/c/platform/frameworks/base/+/3042793

Change-Id: Id7003e648de0503c825f3a41468c497ddb6580f3
Signed-off-by: Automerger Merge Worker <android-build-automerger-merge-worker@system.gserviceaccount.com>