Merge "Add exfat fs in fs_mgr" into main am: bc907c00

Original change: https://android-review.googlesource.com/c/platform/system/core/+/2842875



Change-Id: I82b3097984f056e219d3546d8ecf85f33912ece4
Signed-off-by: Automerger Merge Worker <android-build-automerger-merge-worker@system.gserviceaccount.com>