Add Settings for back animation developer option DO NOT MERGE

Bug: 228936326
Test: BackAnimationPreferenceController
Change-Id: I48516c1f68de799473eac99d35a086046d7e6de9

src/com/android/settings/development/BackAnimationPreferenceDialog.java

@@ -0,0 +1,79 @@
+/*
+ * 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.development;
+
+import android.app.AlertDialog;
+import android.app.Dialog;
+import android.app.settings.SettingsEnums;
+import android.content.DialogInterface;
+import android.os.Bundle;
+
+import androidx.annotation.NonNull;
+import androidx.fragment.app.Fragment;
+import androidx.fragment.app.FragmentActivity;
+import androidx.fragment.app.FragmentManager;
+
+import com.android.settings.R;
+import com.android.settings.core.instrumentation.InstrumentedDialogFragment;
+
+/**
+ * Information dialog shown when enabling back animations
+ */
+public class BackAnimationPreferenceDialog extends InstrumentedDialogFragment
+        implements DialogInterface.OnClickListener {
+
+    public static final String TAG = "BackAnimationDlg";
+
+    private BackAnimationPreferenceDialog() {
+    }
+
+    /**
+     * Show this dialog.
+     */
+    public static void show(@NonNull Fragment host) {
+        FragmentActivity activity = host.getActivity();
+        if (activity == null) {
+            return;
+        }
+        FragmentManager manager = activity.getSupportFragmentManager();
+        if (manager.findFragmentByTag(TAG) == null) {
+            BackAnimationPreferenceDialog dialog = new BackAnimationPreferenceDialog();
+            dialog.setTargetFragment(host, 0 /* requestCode */);
+            dialog.show(manager, TAG);
+        }
+    }
+
+    @Override
+    public int getMetricsCategory() {
+        return SettingsEnums.DIALOG_BACK_ANIMATIONS;
+    }
+
+    @Override
+    @NonNull
+    public Dialog onCreateDialog(Bundle savedInstanceState) {
+        return new AlertDialog.Builder(getActivity())
+                .setTitle(R.string.back_navigation_animation)
+                .setMessage(R.string.back_navigation_animation_dialog)
+                .setPositiveButton(android.R.string.ok, this /* onClickListener */)
+                .create();
+    }
+
+    @Override
+    public void onClick(DialogInterface dialog, int which) {
+        // Do nothing
+    }
+}