Adds settings item for quick affordances.

This is in Display > Lock screen. It reads "Buttons" and the summary
text below it is a comma delimited list of the names of the
currently-selected quick affordances.

Fix: 256662519
Test: Manual verification that the lock screen and wallet
items are gone and the new item is visible and clicking it opens the
Wallpaper & style settings screen

Change-Id: If3746b5d0eb8c61edb9378cdb217ca248b999944

src/com/android/settings/display/CustomizableLockScreenQuickAffordancesPreferenceController.java

@@ -0,0 +1,71 @@
+/*
+ * Copyright (C) 2022 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.display;
+
+import android.content.Context;
+import android.content.Intent;
+import android.text.TextUtils;
+
+import androidx.preference.Preference;
+import androidx.preference.PreferenceScreen;
+
+import com.android.settings.R;
+import com.android.settings.core.BasePreferenceController;
+import com.android.settings.core.PreferenceControllerMixin;
+
+/**
+ * Preference for accessing an experience to customize lock screen quick affordances.
+ */
+public class CustomizableLockScreenQuickAffordancesPreferenceController extends
+        BasePreferenceController implements PreferenceControllerMixin {
+
+    public CustomizableLockScreenQuickAffordancesPreferenceController(Context context, String key) {
+        super(context, key);
+    }
+
+    @Override
+    public int getAvailabilityStatus() {
+        return CustomizableLockScreenUtils.isFeatureEnabled(mContext)
+                ? AVAILABLE
+                : UNSUPPORTED_ON_DEVICE;
+    }
+
+    @Override
+    public void displayPreference(PreferenceScreen screen) {
+        super.displayPreference(screen);
+        final Preference preference = screen.findPreference(getPreferenceKey());
+        if (preference != null) {
+            preference.setOnPreferenceClickListener(preference1 -> {
+                // TODO(b/258471384): open the buttons destination within wallpaper picker.
+                final Intent intent = new Intent(Intent.ACTION_SET_WALLPAPER);
+                final String packageName =
+                        mContext.getString(R.string.config_wallpaper_picker_package);
+                if (!TextUtils.isEmpty(packageName)) {
+                    intent.setPackage(packageName);
+                }
+                mContext.startActivity(intent);
+                return true;
+            });
+            refreshSummary(preference);
+        }
+    }
+
+    @Override
+    public CharSequence getSummary() {
+        return CustomizableLockScreenUtils.getQuickAffordanceSummary(mContext);
+    }
+}