[tests] Add regression test for global ref leak in LayoutInflater.Inflate (#11112)

Fixes: #11101
Fixes: #10989

The fix is in Java.Interop (ConstructPeer + Dispose for Invalid refs),
included via the submodule bump. This adds an on-device regression test
that inflates 100 custom views and asserts the JNI global reference
count does not grow significantly.

Co-authored-by: Copilot <223556219+Copilot@users.noreply.github.com>

Author: jonathanpeppers

external/Java.Interop

@@ -1,4 +1,5 @@
-using Android.App;
+using System;
+using Android.App;
 using Android.Content;
 using Android.Util;
 using Android.Views;
@@ -44,6 +45,47 @@ public void UpperAndLowerCaseCustomWidget_FromLibrary_ShouldNotThrowInflateExcep
 				inflater.Inflate (Resource.Layout.upper_lower_custom, null);
 			}, "Regression test for widgets with uppercase and lowercase namespace (bug #23880) failed.");
 		}
+
+		// https://github.com/dotnet/android/issues/11101
+		[Test]
+		public void InflateCustomView_ShouldNotLeakGlobalRefs ()
+		{
+			var inflater = (LayoutInflater) Application.Context.GetSystemService (Context.LayoutInflaterService);
+			Assert.IsNotNull (inflater);
+
+			// Warm up: inflate once to populate caches and type mappings,
+			// and let any background thread activity from previous tests settle.
+			inflater.Inflate (Resource.Layout.lowercase_custom, null);
+			CollectGarbage (times: 3);
+
+			int grefBefore = Java.Interop.Runtime.GlobalReferenceCount;
+
+			// Use a large number of inflations so that a real leak (3+ global refs
+			// per inflate) produces a delta far above any background noise from
+			// Android system services, GC bridge processing, or finalizer threads.
+			const int inflateCount = 100;
+			for (int i = 0; i < inflateCount; i++) {
+				inflater.Inflate (Resource.Layout.lowercase_custom, null);
+			}
+
+			CollectGarbage (times: 3);
+
+			int grefAfter = Java.Interop.Runtime.GlobalReferenceCount;
+			int delta = grefAfter - grefBefore;
+
+			// A real leak would produce delta >= 300 (3 leaked refs per inflate).
+			// Use a generous threshold to tolerate background noise on real devices.
+			Assert.IsTrue (delta <= 100,
+				$"Global reference leak detected: {delta} extra global refs after inflating/GC'ing {inflateCount} custom views. Before={grefBefore}, After={grefAfter}");
+
+			static void CollectGarbage (int times)
+			{
+				for (int i = 0; i < times; i++) {
+					GC.Collect ();
+					GC.WaitForPendingFinalizers ();
+				}
+			}
+		}
 	}
 
 	public class CustomButton : Button