On this recently swarmed android perf bot at:
https://luci-milo.appspot.com/buildbot/chromium.perf/Android%20Nexus5X%20Perf

When there are failures and Telemetry tries to see if there are stacks to symbolize in the logcat, the script to symbolize fails with:

Traceback (most recent call last):
  File "/b/swarming/w/ir/third_party/android_platform/development/scripts/stack", line 240, in <module>
    sys.exit(main(sys.argv[1:]))
  File "/b/swarming/w/ir/third_party/android_platform/development/scripts/stack", line 196, in main
    constants.CheckOutputDirectory()
  File "/b/swarming/w/ir/third_party/android_platform/development/scripts/../../../../build/android/pylib/constants/__init__.py", line 208, in CheckOutputDirectory
    raise Exception('Neither CHROMIUM_OUTPUT_DIR nor CHROMIUM_OUT_DIR '
Exception: Neither CHROMIUM_OUTPUT_DIR nor CHROMIUM_OUT_DIR has been set

https://luci-logdog.appspot.com/v/?s=chrome%2Fbb%2Fchromium.perf%2FAndroid_Nexus5X_Perf%2F24%2F%2B%2Frecipes%2Fsteps%2Fsystem_health.common_mobile_on_Android%2F0%2Fstdout

The invocation to the symbolize script happens at:
https://cs.chromium.org/chromium/src/third_party/catapult/telemetry/telemetry/internal/platform/android_platform_backend.py?rcl=9e43159fc62c2ba87c5dd5202e38aeb5e207bb68&l=741

We should (either or both):

1. Don't attempt to symbolize anything if there appears to be nothing to symbolize on the logcat (maybe something a quick regex can check?)

2. Make sure that symbolize script works on this new swarmed bot