Merge "Convert mkuserimg_mke2fs to python3" am: b336ca9709 am: 3ce3313b60 am: d381096438

Original change: https://android-review.googlesource.com/c/platform/system/extras/+/1900232

Change-Id: I8db7b2266bfe945b2a050b63439c8134d0499937