Merge "[CTSVerifier] Release virtual display when we are done with it" into marshmallow-cts-dev
am: 577bed408e

* commit '577bed408e8b200fb0ae547a380dc86d7bd8666e':
  [CTSVerifier] Release virtual display when we are done with it

Change-Id: I121522ff808c60c10374c0997d8145f36cc4e39c