on show file chooser - mimoccc/tvapp GitHub Wiki
//tvlib/org.mjdev.tvlib.webscrapper.base/CustomChromeClient/onShowFileChooser
[androidJvm]
open override fun onShowFileChooser(webView: WebView?, filePathCallback: ValueCallback<Array<Uri>>?, fileChooserParams: WebChromeClient.FileChooserParams?): Boolean