Ensure device screen is on for GPU tests

Adds a check before running a GPU Telemetry test for if the test device
is an Android one, and if so, ensures that the screen is on. This is
necessary to prevent flakes on the bots that occur if the screen is
somehow accidentally turned off.

Bug: 1132297
Change-Id: I08c0daaff92260c5c9fc1f52e7f0f7d22b448564
Reviewed-on: https://chromium-review.googlesource.com/c/chromium/src/+/2436779Reviewed-by: Yuly Novikov <ynovikov@chromium.org>
Commit-Queue: Yuly Novikov <ynovikov@chromium.org>
Auto-Submit: Brian Sheedy <bsheedy@chromium.org>
Cr-Commit-Position: refs/heads/master@{#811792}

content/test/gpu/gpu_tests/gpu_integration_test.py

@@ -242,6 +242,11 @@ class GpuIntegrationTest(
       if len(args) == 1 and isinstance(args[0], tuple):
         args = args[0]
       expected_crashes = self.GetExpectedCrashes(args)
+      os_name = self.browser.platform.GetOSName()
+      # The GPU tests don't function correctly if the screen is not on, so
+      # ensure that this is the case.
+      if os_name == 'android':
+        self.browser.platform.android_action_runner.TurnScreenOn()
       self.RunActualGpuTest(url, *args)
     except Exception:
       if ResultType.Failure in expected_results or should_retry_on_failure: