feat: Add mobile command to type Unicode text

[mykola-mokhnach]

No description provided.

[jlipps]

how does this differ from sendkeys?

[KazuCocoa]

Does this set unicode text into the focused field, not like setValue? (The setValue with unicode keyboard capability is kindly relace the field)

[mykola-mokhnach]

@jlipps The main difference is that sendKeys always overrides the existing field text. For example, if one needs to enter st into an input field containing te then it would be necessary to remember the current content, prefix the given content with it and only after that call setText (native UIA API used by sendKeys call). This is not acceptable for cases where Android app under test reacts to each key press (we only expect to get notified with st, but it would be test instead).

There is also key actions W3C API, but it only supports ASCII chars and fails for Unicode (see the issue appium/appium#13154).

So, the only way to achieve the desired input scenario would be the current endpoint.

[mykola-mokhnach]

@KazuCocoa Yes, I did it deliberately, because this endpoint does not care about the actual focus. It just triggers the appropriate key codes and sends them to the system thus emulating actual user interactions.