[Andoid] Threaded TestRunner creation and SetUp and TearDown calls.

build/android/pylib/gtest/test_package_apk.py

Index: build/android/pylib/gtest/test_package_apk.py
diff --git a/build/android/pylib/gtest/test_package_apk.py b/build/android/pylib/gtest/test_package_apk.py
index 3d9a926e422080bd43f3e72317f460fd924fce42..f18d87cd44d0fe6530a5c72c15e920c53615a95f 100644
--- a/build/android/pylib/gtest/test_package_apk.py
+++ b/build/android/pylib/gtest/test_package_apk.py
@@ -73,6 +73,10 @@ class TestPackageApk(TestPackage):
     args += ['shell', 'cat', self._GetFifo()]
     return pexpect.spawn('adb', args, timeout=timeout, logfile=logfile)
 
+  def ClearApplicationState(self):
+    """Clear the application state."""
+    self.adb.ClearApplicationState(self._apk_package_name)
+
   def GetAllTests(self):
     """Returns a list of all tests available in the test suite."""
     self._CreateTestRunnerScript('--gtest_list_tests')