Such settings for Activity is made to input into a Textedit view that placed near the screen bottom.
But for webview it does not help.
Seems, it's some system trouble.
No, IME is not used yet, as no the top coords of the textedit, as it's the form inside the Webview, not the native view.
No idea how to move the Webview up above the keyboard.
You don't have control over the behavior of adjustPan. If it doesn't work as you expect then you should switch to adjustResize as explained in the IME tutorial.