Add --render-results-dir arg to store render results locally.

build/android/pylib/instrumentation/instrumentation_test_instance.py

Index: build/android/pylib/instrumentation/instrumentation_test_instance.py
diff --git a/build/android/pylib/instrumentation/instrumentation_test_instance.py b/build/android/pylib/instrumentation/instrumentation_test_instance.py
index adf36d29a41c038b0a781e00495fa0658883b1e6..bbeb315a77e7adac6bbf7735debedfb8130ff8d8 100644
--- a/build/android/pylib/instrumentation/instrumentation_test_instance.py
+++ b/build/android/pylib/instrumentation/instrumentation_test_instance.py
@@ -489,6 +489,8 @@ class InstrumentationTestInstance(test_instance.TestInstance):
     self._driver_name = None
     self._initializeDriverAttributes()
 
+    self._render_results_dir = None
+    self._screenshot_dir = None
     self._timeout_scale = None
     self._initializeTestControlAttributes(args)
 
@@ -666,6 +668,7 @@ class InstrumentationTestInstance(test_instance.TestInstance):
       self._driver_apk = None
 
   def _initializeTestControlAttributes(self, args):
+    self._render_results_dir = args.render_results_dir
     self._screenshot_dir = args.screenshot_dir
     self._timeout_scale = args.timeout_scale or 1
 
@@ -754,6 +757,10 @@ class InstrumentationTestInstance(test_instance.TestInstance):
     return self._package_info
 
   @property
+  def render_results_dir(self):
+    return self._render_results_dir
+
+  @property
   def screenshot_dir(self):
     return self._screenshot_dir