Move AddReference to BridgeProcessingJniHelper, rename Trigger to TriggerJavaGC

- Move AddReference method from BridgeProcessing to BridgeProcessingJniHelper
- Rename Trigger method to TriggerJavaGC
- Update BridgeProcessing.cs to call helper class methods
- Remove unused static fields

Co-authored-by: simonrozsival <374616+simonrozsival@users.noreply.github.com>

Author: Copilot

src/Mono.Android/Microsoft.Android.Runtime/BridgeProcessing.cs

@@ -59,7 +59,7 @@ public BridgeProcessing (MarkCrossReferencesArgs* args)
 	public void Process ()
 	{
 		PrepareForJavaCollection ();
-		BridgeProcessingJniHelper.Trigger ();
+		BridgeProcessingJniHelper.TriggerJavaGC ();
 		CleanupAfterJavaCollection ();
 		s_logger?.LogGcSummary (crossRefs);
 	}
@@ -133,7 +133,7 @@ void AddCircularReferences (ref StronglyConnectedComponent scc)
 			var prevRef = new JniObjectReference (prev->ControlBlock->Handle, JniObjectReferenceType.Global);
 			var nextRef = new JniObjectReference (next->ControlBlock->Handle, JniObjectReferenceType.Global);
 
-			bool referenceAdded = AddReference (prevRef, nextRef);
+			bool referenceAdded = BridgeProcessingJniHelper.AddReference (prevRef, nextRef, s_logger);
 			if (!referenceAdded) {
 				throw new InvalidOperationException ("Failed to add reference between objects in a strongly connected component");
 			}
@@ -148,7 +148,7 @@ void AddCrossReference (nuint sourceIndex, nuint destIndex)
 		var (fromRef, fromContextPtr) = SelectCrossReferenceTarget (sourceIndex);
 		var (toRef, _) = SelectCrossReferenceTarget (destIndex);
 
-		if (AddReference (fromRef, toRef) && fromContextPtr != IntPtr.Zero) {
+		if (BridgeProcessingJniHelper.AddReference (fromRef, toRef, s_logger) && fromContextPtr != IntPtr.Zero) {
 			HandleContext* fromContext = (HandleContext*)fromContextPtr;
 			fromContext->ControlBlock->RefsAdded = 1;
 		}
@@ -176,37 +176,6 @@ void AddCrossReference (nuint sourceIndex, nuint destIndex)
 		return (reference, (IntPtr)context);
 	}
 
-	bool AddReference (JniObjectReference from, JniObjectReference to)
-	{
-		if (!from.IsValid || !to.IsValid) {
-			return false;
-		}
-
-		// Try the optimized path for GCUserPeerable (NativeAOT)
-		if (!RuntimeFeature.IsCoreClrRuntime) {
-			if (BridgeProcessingJniHelper.TryAddManagedReference (from, to)) {
-				return true;
-			}
-		}
-
-		// Fall back to reflection-based approach
-		var fromClassRef = JniEnvironment.Types.GetObjectClass (from);
-		using var fromClass = new JniType (ref fromClassRef, JniObjectReferenceOptions.CopyAndDispose);
-
-		JniMethodInfo addMethod;
-		try {
-			addMethod = fromClass.GetInstanceMethod ("monodroidAddReference", "(Ljava/lang/Object;)V");
-		} catch (Java.Lang.NoSuchMethodError) {
-			s_logger?.LogMissingAddReferencesMethod (fromClass);
-			return false;
-		}
-
-		JniArgumentValue* args = stackalloc JniArgumentValue[1];
-		args[0] = new JniArgumentValue (to);
-		JniEnvironment.InstanceMethods.CallVoidMethod (from, addMethod, args);
-		return true;
-	}
-
 	void TakeWeakGlobalRef (HandleContext* context)
 	{
 		Debug.Assert (context != null && context->ControlBlock != null, "Context or control block is null");

src/Mono.Android/Microsoft.Android.Runtime/BridgeProcessingJniHelper.cs

@@ -33,7 +33,7 @@ static BridgeProcessingJniHelper ()
 		}
 	}
 
-	public static void Trigger ()
+	public static void TriggerJavaGC ()
 	{
 		try {
 			JniEnvironment.InstanceMethods.CallVoidMethod (s_RuntimeInstance, s_Runtime_gc!, null);
@@ -42,6 +42,37 @@ public static void Trigger ()
 		}
 	}
 
+	public static bool AddReference (JniObjectReference from, JniObjectReference to, BridgeProcessingLogger? logger)
+	{
+		if (!from.IsValid || !to.IsValid) {
+			return false;
+		}
+
+		// Try the optimized path for GCUserPeerable (NativeAOT)
+		if (!RuntimeFeature.IsCoreClrRuntime) {
+			if (TryAddManagedReference (from, to)) {
+				return true;
+			}
+		}
+
+		// Fall back to reflection-based approach
+		var fromClassRef = JniEnvironment.Types.GetObjectClass (from);
+		using var fromClass = new JniType (ref fromClassRef, JniObjectReferenceOptions.CopyAndDispose);
+
+		JniMethodInfo addMethod;
+		try {
+			addMethod = fromClass.GetInstanceMethod ("monodroidAddReference", "(Ljava/lang/Object;)V");
+		} catch (Java.Lang.NoSuchMethodError) {
+			logger?.LogMissingAddReferencesMethod (fromClass);
+			return false;
+		}
+
+		JniArgumentValue* args = stackalloc JniArgumentValue[1];
+		args[0] = new JniArgumentValue (to);
+		JniEnvironment.InstanceMethods.CallVoidMethod (from, addMethod, args);
+		return true;
+	}
+
 	public static bool TryAddManagedReference (JniObjectReference from, JniObjectReference to)
 	{
 		if (s_GCUserPeerableClass == null || s_GCUserPeerable_jiAddManagedReference == null) {