Fix typos in CTS Verifier strings

"Grant" permission rather than "Allow".
Use American spellings.
Correct it's vs. its.
Use consistent capitalizations for VPN and 6DoF.
Other general typos.

Test: Automated test is not appropriate

Change-Id: I1d549a78a29c7f45677f4bce7d2e3413ec2aa3d4
1 file changed