Start private space setup when there is no private space set

This change handles as below based on if private space already exists on device:
1. If PS doesn't exist then start the setup flow which shows a PS education screen. On setup button creates the private space.
2. If PS already exists on device then display PS settings page.

Bug: 299069146
Test: atest PrivateSpaceSettingsAuthenticatorTest
Change-Id: I46bdbaeb0210fd5b41a426f852e3f455b62c1c29

src/com/android/settings/privatespace/PrivateSpaceEducation.java

@@ -0,0 +1,87 @@
+/*
+ * Copyright (C) 2023 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.privatespace;
+
+import android.app.Activity;
+import android.os.Bundle;
+import android.view.LayoutInflater;
+import android.view.View;
+import android.view.ViewGroup;
+
+import androidx.annotation.Nullable;
+import androidx.fragment.app.Fragment;
+
+import com.android.settings.R;
+
+import com.google.android.setupcompat.template.FooterBarMixin;
+import com.google.android.setupcompat.template.FooterButton;
+import com.google.android.setupdesign.GlifLayout;
+
+/** Fragment educating about the usage of Private Space. */
+public class PrivateSpaceEducation extends Fragment {
+    @Override
+    public View onCreateView(
+            LayoutInflater inflater,
+            @Nullable ViewGroup container,
+            @Nullable Bundle savedInstanceState) {
+        GlifLayout rootView =
+                (GlifLayout)
+                        inflater.inflate(R.layout.privatespace_education_screen, container, false);
+        final FooterBarMixin mixin = rootView.getMixin(FooterBarMixin.class);
+        mixin.setPrimaryButton(
+                new FooterButton.Builder(getContext())
+                        .setText(R.string.privatespace_setup_button_label)
+                        .setListener(onSetup())
+                        .setButtonType(FooterButton.ButtonType.NEXT)
+                        .setTheme(com.google.android.setupdesign.R.style.SudGlifButton_Primary)
+                        .build());
+        mixin.getPrimaryButtonView().setFilterTouchesWhenObscured(true);
+        mixin.setSecondaryButton(
+                new FooterButton.Builder(getContext())
+                        .setText(R.string.privatespace_cancel_label)
+                        .setListener(onCancel())
+                        .setButtonType(FooterButton.ButtonType.CANCEL)
+                        .setTheme(
+                                com.google.android.setupdesign.R.style
+                                        .Base_TextAppearance_AppCompat_Widget_Button)
+                        .build());
+        mixin.getSecondaryButtonView().setFilterTouchesWhenObscured(true);
+
+        return rootView;
+    }
+
+    private View.OnClickListener onSetup() {
+        return v -> {
+            if (PrivateSpaceMaintainer.getInstance(getContext()).createPrivateSpace()) {
+                finishActivity();
+            }
+        };
+    }
+
+    private View.OnClickListener onCancel() {
+        return v -> {
+            finishActivity();
+        };
+    }
+
+    private void finishActivity() {
+        Activity activity = getActivity();
+        if (activity != null) {
+            activity.finish();
+        }
+    }
+}