Integration tests for window.orientation using Android instrumentations.

It will be used as a foundation for the coming Screen Orientation API
tests.

BUG=342830

Review URL: https://codereview.chromium.org/159743003

git-svn-id: svn://svn.chromium.org/chrome/trunk/src@251682 0039d316-1c4b-4281-b951-d872f2087c98
SVN changes up to revision 251682