Merge "fs_mgr: overlayfs: check if scratch device is ext4 dedupe" am: a22e74cd4e am: d84ccd640b

Original change: https://android-review.googlesource.com/c/platform/system/core/+/1234486

Change-Id: I7612a0c549258a420a0e53df8ff3a43b8750a3e7