Merge "Add license_note and GPL 3.0" am: 886b9c47c2 am: 684f9c1f5d am: 21033ac00c am: 9b632a08d9

Original change: https://android-review.googlesource.com/c/platform/external/mtools/+/2012221

Change-Id: I495013083fc64dc85b6201e33c23be1cc50c8d4a