Follow-up improvements to zen mode icon picker

* Propose icons from com.android.internal.R instead of android.R (as a proof of concept) since this is what we'll be doing with the final icons.
* Provide the icon options as a parameter to the controller (can also be used for testing).
* Fix some Lint warnings.

Test: atest ZenModeIconPickerListPreferenceControllerTest
Bug: 333901673
Flag: android.app.modes_ui
Change-Id: I023eed0fd5719c5c4540f8d145335f60d088e7fb

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

@@ -0,0 +1,28 @@
+/*
+ * 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 androidx.annotation.DrawableRes;
+
+import com.google.common.collect.ImmutableList;
+
+interface IconOptionsProvider {
+
+    ImmutableList<IconInfo> getIcons();
+
+    record IconInfo(@DrawableRes int resId, String description) { }
+}