Generalize HideSoftInputOnTapped on Android and iOS to support 3rd pa…

…rty input controls (#19626)

* Generalize HideSoftInputOnTapped on Android and iOS to support 3rd party input controls.

* - remove predicate on iOS

* - fix

---------

Co-authored-by: Shane Neuville <shneuvil@microsoft.com>

src/Controls/src/Core/ContentPage/HideSoftInputOnTappedChanged/HideSoftInputOnTappedChangedManager.Android.cs

@@ -3,6 +3,7 @@
 using Android.Widget;
 using Microsoft.Maui.Graphics;
 using AView = Android.Views.View;
+using AViewGroup = Android.Views.ViewGroup;
 
 namespace Microsoft.Maui.Controls
 {
@@ -43,21 +44,12 @@ page.Handler is IPlatformViewHandler pvh &&
 		// This is called from InputViews as they are added to the visual tree
 		IDisposable? SetupHideSoftInputOnTapped(AView aView)
 		{
-			if (aView is SearchView sv &&
-				sv.GetFirstChildOfType<EditText>() is EditText editText)
+			if (aView is AViewGroup vg &&
+				vg.GetFirstChildOfType<EditText>() is {} editText)
 			{
 				aView = editText;
 			}
 
-			if (aView is AndroidX.AppCompat.Widget.SearchView svX &&
-				svX.GetFirstChildOfType<EditText>() is EditText editTextX)
-			{
-				aView = editTextX;
-			}
-
-			if (aView is null)
-				return null;
-
 			if (!FeatureEnabled)
 				return null;
 

src/Controls/src/Core/ContentPage/HideSoftInputOnTappedChanged/HideSoftInputOnTappedChangedManager.iOS.cs

@@ -7,22 +7,27 @@ namespace Microsoft.Maui.Controls
 {
 	partial class HideSoftInputOnTappedChangedManager
 	{
-		internal IDisposable? SetupHideSoftInputOnTapped(UIView uIView)
+		internal IDisposable? SetupHideSoftInputOnTapped(UIView uiView)
 		{
-			if (!FeatureEnabled || uIView.Window is null)
+			if (!FeatureEnabled || uiView.Window is null)
+			{
 				return null;
+			}
+
+			UIView? uiText = uiView;
 
-			if (uIView is UISearchBar searchBar &&
-				searchBar.GetSearchTextField() is UIView textField)
+			if (uiText is not (UITextField or UITextView))
 			{
-				uIView = textField;
+				uiText = uiView.FindDescendantView<UIView>((view) => view is (UITextField or UITextView));
 			}
 
-			if (uIView is null)
+			if (uiText is null)
+			{
 				return null;
+			}
 
 			return ResignFirstResponderTouchGestureRecognizer
-					.Update(uIView);
+					.Update(uiText);
 		}
 	}
 }