[Appium][Flutter]Espresso driver x Flutter

I have updated my sandbox repository for Flutter x Appium.

Update test app based on Flutter 1.0

Update test scenarios for it

In Android, I could launch and through a simple scenario with UIA2 driver. But I could not succeed to launch it with Espresso driver. Below log is here

$ ruby test.rb
UnknownError: An unknown server-side error occurred while processing the command. Original error: android.util.AndroidException: INSTRUMENTATION_FAILED: io.appium.espressoserver.test/androidx.test.runner.AndroidJUnitRunner: An unknown server-side error occurred while processing the command. Original error: android.util.AndroidException: INSTRUMENTATION_FAILED: io.appium.espressoserver.test/androidx.test.runner.AndroidJUnitRunner (Selenium::WebDriver::Error::UnknownError)
        from     at getResponseForW3CError (/Users/kazuaki/GitHub/appium/node_modules/appium-base-driver/lib/protocol/errors.js:826:9)
        from     at asyncHandler (/Users/kazuaki/GitHub/appium/node_modules/appium-base-driver/lib/protocol/protocol.js:447:37)
        from     at <anonymous>
        from /Users/kazuaki/.rbenv/versions/2.4.3/lib/ruby/gems/2.4.0/gems/selenium-webdriver-3.141.0/lib/selenium/webdriver/remote/response.rb:69:in `assert_ok'
        from /Users/kazuaki/.rbenv/versions/2.4.3/lib/ruby/gems/2.4.0/gems/selenium-webdriver-3.141.0/lib/selenium/webdriver/remote/response.rb:32:in `initialize'
        from /Users/kazuaki/.rbenv/versions/2.4.3/lib/ruby/gems/2.4.0/gems/selenium-webdriver-3.141.0/lib/selenium/webdriver/remote/http/common.rb:84:in `new'
        from /Users/kazuaki/.rbenv/versions/2.4.3/lib/ruby/gems/2.4.0/gems/selenium-webdriver-3.141.0/lib/selenium/webdriver/remote/http/common.rb:84:in `create_response'
        from /Users/kazuaki/.rbenv/versions/2.4.3/lib/ruby/gems/2.4.0/gems/selenium-webdriver-3.141.0/lib/selenium/webdriver/remote/http/default.rb:104:in `request'
        from /Users/kazuaki/.rbenv/versions/2.4.3/lib/ruby/gems/2.4.0/gems/appium_lib_core-2.3.1/lib/appium_lib_core/common/base/http_default.rb:33:in `call'
        from /Users/kazuaki/.rbenv/versions/2.4.3/lib/ruby/gems/2.4.0/gems/selenium-webdriver-3.141.0/lib/selenium/webdriver/remote/bridge.rb:166:in `execute'
        from /Users/kazuaki/.rbenv/versions/2.4.3/lib/ruby/gems/2.4.0/gems/appium_lib_core-2.3.1/lib/appium_lib_core/common/base/bridge.rb:93:in `create_session'
        from /Users/kazuaki/.rbenv/versions/2.4.3/lib/ruby/gems/2.4.0/gems/appium_lib_core-2.3.1/lib/appium_lib_core/common/base/bridge.rb:33:in `handshake'
        from /Users/kazuaki/.rbenv/versions/2.4.3/lib/ruby/gems/2.4.0/gems/appium_lib_core-2.3.1/lib/appium_lib_core/common/base/driver.rb:20:in `initialize'
        from /Users/kazuaki/.rbenv/versions/2.4.3/lib/ruby/gems/2.4.0/gems/appium_lib_core-2.3.1/lib/appium_lib_core/driver.rb:242:in `new'
        from /Users/kazuaki/.rbenv/versions/2.4.3/lib/ruby/gems/2.4.0/gems/appium_lib_core-2.3.1/lib/appium_lib_core/driver.rb:242:in `start_driver'
        from test.rb:42:in `run_android_test'
        from test.rb:85:in `<main>'

Something happened with instrumentation combination… mmm

Anyway, XCUITest for iOS and UIA2 for Android worked as same as before 1.0.