Merge "Merge "DO NOT MERGE: Bump CTS and CTS Verifier to 6.0_r21" into marshmallow-cts-dev am: fb2e015eaa  -s ours" into nougat-cts-dev am: 9c7e3582db  -s ours am: e495986d8c
am: b7d7f41dcb

Change-Id: I7914e32aecb5beb5f696ed06d8be47e9969e34a1