Take non-default browser target location into account when attaching to it.

telemetry/telemetry/internal/app/android_process.py

Index: telemetry/telemetry/internal/app/android_process.py
diff --git a/telemetry/telemetry/internal/app/android_process.py b/telemetry/telemetry/internal/app/android_process.py
index 3c9a2943b1827b2d2ae86e3b1af6dd117fe2acb0..b99eac31f576043787470d63b796607842ac7523 100644
--- a/telemetry/telemetry/internal/app/android_process.py
+++ b/telemetry/telemetry/internal/app/android_process.py
@@ -40,9 +40,10 @@ class AndroidProcess(object):
       self._app_backend.platform_backend.ForwardHostToDevice(
           self._local_port, self._remote_devtools_port)
       if devtools_client_backend.IsDevToolsAgentAvailable(
-          self._local_port, self._app_backend):
+          self._local_port, None, self._app_backend):
         self._devtools_client = devtools_client_backend.DevToolsClientBackend(
-            self._local_port, self._remote_devtools_port, self._app_backend)
+            self._local_port, None, self._remote_devtools_port,
+            self._app_backend)
 
   def GetWebViews(self):
     webviews = []