Merge "fs_mgr: Refactor fs_mgr_overlayfs_already_mounted() to be more...

Merge "fs_mgr: Refactor fs_mgr_overlayfs_already_mounted() to be more readable" into main am: 9603a829 am: fd742433 am: 0de639dc

Original change: https://android-review.googlesource.com/c/platform/system/core/+/2745620



Change-Id: Ic4bb4020322070cff178b4d3d24b3ab792053554
Signed-off-by: Automerger Merge Worker <android-build-automerger-merge-worker@system.gserviceaccount.com>