[Android] JUnit test runner changes.

build/android/pylib/junit/test_dispatcher.py

+# Copyright 2014 The Chromium Authors. All rights reserved.
+# Use of this source code is governed by a BSD-style license that can be
+# found in the LICENSE file.
+
+def RunTests(tests, runner_factory):
+  """Runs a set of java tests on the host.
+
+  Return:
+    A tuple containing the results & the exit code.
+  """
+  def run(t):
+    runner = runner_factory(None, None)
+    runner.SetUp()
+    result = runner.RunTest(t)
+    runner.TearDown()
+    return result == 0
+
+  return (None, 0 if all(run(t) for t in tests) else 1)
+