Disable text input suggestions and auto-complete

[jcsawyer]

Is your feature request related to a problem? Please describe.

I have an app transmitting text typed in on a textbox directly to another app.
The suggestions and auto complete do not work this this approach.

Describe the solution you'd like

TextInputOptions provides an option named HideSuggestions or something similar that when set on a text box, the keyboard does not show the autocomplete/word suggestions above the keys.

Describe alternatives you've considered

I was able to use TextInputOptions.Multiline="True" TextInputOptions.ReturnKeyType="Return" TextInputOptions.ContentType="Password" on the textbox to achieve mostly what I'm after, which works fine on Android but on iOS displays a "passwords" button above the keyboard which isn't ideal.

Alternatively, I could buffer text to send, but I want to be able to do both.

Additional context

I was looking in the code and did a rough change to see how it might work.
After adding a HideSuggestions property to TextInputOptions, I updated AndroidInputMethod with the following:

if (outAttrs.InputType is InputTypes.ClassText && options.HideSuggestions)
    outAttrs.InputType = InputTypes.TextVariationVisiblePassword | InputTypes.TextFlagNoSuggestions;

This however doesn't really result in any difference on the Android side as it turns out most keyboards don't really pay attention to the TextFlagNoSuggestsions flag. One of the downsides with either of these approaches is that you lose the ability to use emojis (not the end of the world if this isn't achievable).

On the iOS side, I updated TextInputResponder.Properties.cs with:

[Export("autocorrectionType")]
public UITextAutocorrectionType AutocorrectionType =>
    _view._options == null ?
        UITextAutocorrectionType.Yes :
        _view._options.HideSuggestions ?
            UITextAutocorrectionType.No :
            UITextAutocorrectionType.Yes;

and

[Export("spellCheckingType")]
public UITextSpellCheckingType SpellCheckingType =>
    _view._options == null ?
        UITextSpellCheckingType.Yes :
        _view._options.HideSuggestions ?
            UITextSpellCheckingType.No :
            UITextSpellCheckingType.Yes;

This gives me the ideal keyboard that I require.