GitLab

Adding Test Fixture for initial test cases for the App Remoting Test Driver.  Also includes the public stubs for the remote application data methods.

Also ran clang-format on edited files to keep consistent with formatting
in my previous changelist.

BUG=467200

Review URL: https://codereview.chromium.org/1008043003

Cr-Commit-Position: refs/heads/master@{#322119}