feat(android): update WebView to support camera/gallery picker for input fields

[m1ga]

Features:

• show a camera/gallery picker for accept="image/*" input fields

var win = Ti.UI.createWindow({});

var webview = Ti.UI.createWebView({
	html: '<input type="file" id="picture" name="picture" accept="image/*"  />'
})

win.add(webview);
win.open();