Configure backing device max_ratio for FUSE filesystems. am: a485006ab1 am: 5ed648d098 am: c980b5387a am: 68bfed23cb

Original change: https://googleplex-android-review.googlesource.com/c/platform/system/vold/+/12024019

Change-Id: Ibab97f4b5617962d39d15dc7e2db7fe6ee193eb3