https://developer.android.com/reference/android/support/test/runner/AndroidJUnitRunner.html
-e timeout_msec 5000
https://cloud.google.com/sdk/gcloud/reference/firebase/test/android/run
--environment-variables key=value
Command
gcloud firebase test android run \
--type instrumentation \
--app $PATH_TO_DEBUG_APK \
--test $PATH_TO_ANDROID_TEST_APK \
--device-ids 'Nexus5' \
--os-version-ids 19 \
--locales ja \
--environment-variables timeout_msec=30000 \