Fix some Android keyboards that didn't work properly.

This conversation came from Joshua Granick on Twitter, starting here:

https://twitter.com/singmajesty/status/653640543675641857

"We found an issue where certain Android keyboards (like the S6 with
predictive text) wouldn't work ... Certain keyboards use a predictive text
mode that does not dispatch a traditional onKey events, which is troublesome
... but telling the OS to use a "visible password" keyboard helps deal with
this problem ... perhaps there's some other way (onKeyPreIme?) to do
"textediting" events, but for now, this should be a fast fix ...
I hear it affects the Galaxy Tab A 8.0", Galaxy S6, Asus ZenPhone 2, maybe
others"

android-project/src/org/libsdl/app/SDLActivity.java

@@ -1393,6 +1393,7 @@ class DummyEdit extends View implements View.OnKeyListener {
     public InputConnection onCreateInputConnection(EditorInfo outAttrs) {
         ic = new SDLInputConnection(this, true);
 
+        outAttrs.inputType = InputType.TYPE_CLASS_TEXT | InputType.TYPE_TEXT_VARIATION_VISIBLE_PASSWORD;
         outAttrs.imeOptions = EditorInfo.IME_FLAG_NO_EXTRACT_UI
                 | 33554432 /* API 11: EditorInfo.IME_FLAG_NO_FULLSCREEN */;