fix raise an error for launch app and close app since they do not need in espresso

[KazuCocoa]

Current launchApp missed espresso session like below scenario since espresso-driver does not establish a new session with the launched app

@driver.close_app
assert(@@core.wait { @driver.app_state('io.appium.android.apis') != :running_in_foreground })

@driver.launch_app
e = @@core.wait { @driver.find_element :accessibility_id, 'App' }
assert_equal 'App', e.text

Then, below error raises in find_element.

Appium::Core::Wait::TimeoutError: timed out after 20 seconds (An unknown server-side error occurred while processing the command. Original error: Could not proxy. Proxy error: Could not proxy command to remote server. Original error: Error: socket hang up)

https://dev.azure.com/kazucocoa/ruby_lib_core/_build/results?buildId=1265

[mykola-mokhnach]

I don't think launchApp/closeApp have much sense in Espresso, since terminating the app means session termination

[KazuCocoa]

Ah... yeah, sounds reasonable.
Let me raise an error since they do not work expectedly.
Will mark as not support in espresso driver in https://github.com/appium/appium/blob/master/commands-yml/commands/device/app/launch-app.yml and https://github.com/appium/appium/blob/master/commands-yml/commands/device/app/close-app.yml

[mykola-mokhnach]

Please create a new session in order to launch the application under test

[mykola-mokhnach]

Please quit the session in order to close the application under test