[Android] Stop using --flakiness-dashboard-server for gtests.

scripts/slave/recipes/chromium.expected/full_chromium_fyi_Android_Tests__trial__dbg_.json

 [
   {
     "cmd": [
       "python",
       "-u",
       "\nimport sys, os\npath = sys.argv[1]\nmode = int(sys.argv[2])\nif not os.path.isdir(path):\n  if os.path.exists(path):\n    print \"%s exists but is not a dir\" % path\n    sys.exit(1)\n  os.makedirs(path, mode)\n",
       "[BUILDER_CACHE]/Android_Tests__trial__dbg_",
       "511"
     ],
     "name": "makedirs checkout path",
@@ skipping 587 matching lines @@
     "name": "spawn_device_monitor"
   },
   {
     "cmd": [
       "python",
       "-u",
       "[BUILDER_CACHE]/Android_Tests__trial__dbg_/src/out/Debug/bin/run_gfx_unittests",
       "--blacklist-file",
       "[BUILDER_CACHE]/Android_Tests__trial__dbg_/src/out/bad_devices.json",
       "--verbose",
-      "--flakiness-dashboard-server=test-results.appspot.com",
       "--json-results-file",
       "/path/to/tmp/json",
       "--adb-path",
       "[BUILDER_CACHE]/Android_Tests__trial__dbg_/src/third_party/android_tools/sdk/platform-tools/adb"
     ],
     "cwd": "[BUILDER_CACHE]/Android_Tests__trial__dbg_",
     "env": {
       "GOMA_SERVICE_ACCOUNT_JSON_FILE": "/creds/service_accounts/service-account-goma-client.json",
       "PATH": "[BUILDER_CACHE]/Android_Tests__trial__dbg_/src/third_party/android_tools/sdk/platform-tools:[BUILDER_CACHE]/Android_Tests__trial__dbg_/src/build/android:%(PATH)s"
     },
@@ skipping 127 matching lines @@
       "@@@STEP_LOG_LINE@python.inline@  os.remove(report)@@@",
       "@@@STEP_LOG_END@python.inline@@@"
     ]
   },
   {
     "name": "$result",
     "recipe_result": null,
     "status_code": 0
   }
 ]