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

Merge "fs_mgr: overlayfs: check if scratch device is ext4 dedupe" am: a22e74cd am: d84ccd64 am: b41ffef5

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

Change-Id: I3d1b7480cb6f735491bca40e703c68b14e8bab7f