Merge "DO NOT MERGE: Bump CTS and CTS Verifier to 6.0_r20" into marshmallow-cts-dev am: 34c68a07e2  -s ours am: 09e0424548 am: 0b3b5dccc6 am: 4b90a0a01e am: ff39a57d19  -s ours am: 0b1bbe3edc am: 975a7c4275 am: 00b57deea7 am: c2e0b37663 am: f6cb521189  -s ours
am: 0f230de217

Change-Id: I92c50553f17b3cb0ca13945511af9c91dc054c51