Dynamic port detection for Aardvark tests

Automatic port detection is added to RemoteAardvarkTouchDevice.

BUG=none
TEST=Manual test

Change-Id: I083c94d42228394334c634128942d785b46d49e8
Reviewed-on: https://chromium-review.googlesource.com/287514
Reviewed-by: Charlie Mooney <[email protected]>
Tested-by: Amirhossein Simjour <[email protected]>
Commit-Queue: Amirhossein Simjour <[email protected]>
1 file changed