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

Change-Id: I67c24674f05802fa6fe87ea2bbd5f173a11302bb