[Android] Ensure perf test runner does not create shards for blacklisted devices.

build/android/pylib/perf/setup.py

Index: build/android/pylib/perf/setup.py
diff --git a/build/android/pylib/perf/setup.py b/build/android/pylib/perf/setup.py
index 31db14fa031e0cccfe8b573bb6bc0b56f9dbaaeb..b3aa086242a39e8c41d42d4e41eef28639c2a617 100644
--- a/build/android/pylib/perf/setup.py
+++ b/build/android/pylib/perf/setup.py
@@ -98,8 +98,10 @@ def Setup(test_options, active_devices):
       flaky_steps = json.load(f)
 
   def TestRunnerFactory(device, shard_index):
-    return test_runner.TestRunner(
-        test_options, device, shard_index, len(all_devices),
-        steps_dict, flaky_steps)
+    if str(device) in active_devices:
+      return test_runner.TestRunner(
+          test_options, device, shard_index, len(all_devices),
+          steps_dict, flaky_steps)
+    return None
 
   return (TestRunnerFactory, sorted_step_names, all_devices)