Moving IconProvider extensions to a separate subclass instead of routing via APIWrapper

Also adding plugin support for IconProvider

Bug: 366237794
Flag: EXEMPT refactor and extra code behind plugin
Test: Manual
Change-Id: Id286f88b2683e0fabc48c57b7920024f06dd7539

src_plugins/com/android/systemui/plugins/IconProcessorPlugin.java

@@ -0,0 +1,46 @@
+/*
+ * Copyright (C) 2025 The Android Open Source Project
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *      http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+package com.android.systemui.plugins;
+
+import android.content.ComponentName;
+import android.content.pm.ApplicationInfo;
+import android.graphics.drawable.Drawable;
+import android.os.UserHandle;
+
+import com.android.systemui.plugins.annotations.ProvidesInterface;
+
+import java.util.function.BiConsumer;
+
+/**
+ * Implement this interface to process Launcher icon drawables before they are displayed.
+ */
+@ProvidesInterface(action = IconProcessorPlugin.ACTION, version = IconProcessorPlugin.VERSION)
+public interface IconProcessorPlugin extends Plugin {
+    String ACTION = "com.android.systemui.action.ICON_WRAPPER_PLUGIN";
+    int VERSION = 1;
+
+    /**
+     * Sets a callback to be called with packageName and userHandle, whenever an icon changes
+     */
+    void setIconChangeNotifier(BiConsumer<String, UserHandle> callback);
+
+    /** Preprocess the provided drawable and returns the modified drawable */
+    Drawable preprocessDrawable(Drawable original, int resId, ApplicationInfo appInfo);
+
+    /** Notifies when an app icon is loaded from cache */
+    void notifyAppIconLoaded(ComponentName cn, UserHandle user, int bitmapInfoFlags);
+}