Load app-provided mode icons asynchronously, and cache them

Bug: 333528586
Bug: 308819461
Test: atest IconLoaderTest
Flag: android.app.modes_ui
Change-Id: I230d0a17bf21533dfca1f25d4806f9231105801b

src/com/android/settings/notification/modes/FutureUtil.java

@@ -0,0 +1,50 @@
+/*
+ * Copyright (C) 2024 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.settings.notification.modes;
+
+import android.util.Log;
+
+import com.google.common.util.concurrent.FutureCallback;
+import com.google.common.util.concurrent.Futures;
+import com.google.common.util.concurrent.ListenableFuture;
+
+import java.util.concurrent.Executor;
+import java.util.function.Consumer;
+
+class FutureUtil {
+
+    private static final String TAG = "ZenFutureUtil";
+
+    static <V> void whenDone(ListenableFuture<V> future, Consumer<V> consumer, Executor executor) {
+        whenDone(future, consumer, executor, "Error in future");
+    }
+
+    static <V> void whenDone(ListenableFuture<V> future, Consumer<V> consumer, Executor executor,
+            String errorLogMessage, Object... errorLogMessageArgs) {
+        Futures.addCallback(future, new FutureCallback<V>() {
+            @Override
+            public void onSuccess(V v) {
+                consumer.accept(v);
+            }
+
+            @Override
+            public void onFailure(Throwable throwable) {
+                Log.e(TAG, String.format(errorLogMessage, errorLogMessageArgs), throwable);
+            }
+        }, executor);
+    }
+}