Skip the screenshot_sync test properly.

testing/scripts/run_telemetry_benchmark_as_googletest.py

Index: testing/scripts/run_telemetry_benchmark_as_googletest.py
diff --git a/testing/scripts/run_telemetry_benchmark_as_googletest.py b/testing/scripts/run_telemetry_benchmark_as_googletest.py
index 571542224c74de34dac38d707b34cccbc822ff3b..39af8f015dbc81fa5a14e696d8790478c06e3002 100755
--- a/testing/scripts/run_telemetry_benchmark_as_googletest.py
+++ b/testing/scripts/run_telemetry_benchmark_as_googletest.py
@@ -80,6 +80,9 @@ def main():
 
     if not valid and not failures:
       failures = ['(entire test suite)']
+      if rc == 0:
+        rc = 1  # Signal an abnormal exit.
+
     json.dump({
         'valid': valid,
         'failures': failures,