[android] Remove timeout for instrumentation tests.

NOTRY=True
BUG=248612
TEST=None

Review URL: https://chromiumcodereview.appspot.com/16370005

git-svn-id: http://src.chromium.org/svn/trunk/src/build@205815 4ff67af0-8c30-449e-8e8b-ad334ec8d88c

android/pylib/instrumentation/dispatch.py

@@ -56,4 +56,5 @@ def Dispatch(options):
 
   return shard.ShardAndRunTests(TestRunnerFactory, attached_devices, tests,
                                 options.build_type,
+                                test_timeout=None,
                                 num_retries=options.num_retries)