Update ActionDisabledByAdminDialogHelper

- For managed devices, "Learn more" takes the user to a support
page
- Put back the "If you have questions, contact your IT admin"
dialog content text
- Update header to 'Blocked by your IT admin' for managed devices

Fixes: 184107103
Test: manual
Test: atest ActionDisabledByAdminDialogHelperTest
Test: atest ActionDisabledLearnMoreButtonLauncherImplTest
Change-Id: Ie5b8a21b9ba295435d5709f9b0374035141d319a

src/com/android/settings/enterprise/ActionDisabledLearnMoreButtonLauncherImpl.java

@@ -0,0 +1,121 @@
+/*
+ * Copyright (C) 2021 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.enterprise;
+
+import static java.util.Objects.requireNonNull;
+
+import android.app.Activity;
+import android.app.admin.DevicePolicyManager;
+import android.content.Intent;
+import android.net.Uri;
+import android.os.UserHandle;
+import android.os.UserManager;
+
+import androidx.appcompat.app.AlertDialog;
+
+import com.android.settings.R;
+import com.android.settings.Settings;
+import com.android.settings.applications.specialaccess.deviceadmin.DeviceAdminAdd;
+import com.android.settingslib.RestrictedLockUtils.EnforcedAdmin;
+import com.android.settingslib.enterprise.ActionDisabledLearnMoreButtonLauncher;
+
+import java.util.function.BiConsumer;
+
+/**
+ * Helper class to set up the "Learn more" button in the action disabled dialog.
+ */
+public class ActionDisabledLearnMoreButtonLauncherImpl
+        implements ActionDisabledLearnMoreButtonLauncher {
+
+    static final BiConsumer<Activity, EnforcedAdmin> SHOW_ADMIN_POLICIES =
+            (activity, enforcedAdmin) -> {
+                showAdminPolicies(enforcedAdmin, activity);
+                activity.finish();
+            };
+
+    static final BiConsumer<Activity, String> LAUNCH_HELP_PAGE = (activity, url) -> {
+        launchLearnMoreHelpPage(activity, url);
+        activity.finish();
+    };
+
+    @Override
+    public void setupLearnMoreButtonToShowAdminPolicies(
+            Activity activity,
+            AlertDialog.Builder builder,
+            int enforcementAdminUserId,
+            EnforcedAdmin enforcedAdmin) {
+        requireNonNull(activity);
+        requireNonNull(builder);
+        requireNonNull(enforcedAdmin);
+        // The "Learn more" button appears only if the restriction is enforced by an admin in the
+        // same profile group. Otherwise the admin package and its policies are not accessible to
+        // the current user.
+        final UserManager um = UserManager.get(activity);
+        if (um.isSameProfileGroup(enforcementAdminUserId, um.getUserHandle())) {
+            setupLearnMoreButton(builder, () ->
+                    SHOW_ADMIN_POLICIES.accept(activity, enforcedAdmin));
+        }
+    }
+
+    @Override
+    public void setupLearnMoreButtonToLaunchHelpPage(
+            Activity activity,
+            AlertDialog.Builder builder,
+            String url) {
+        requireNonNull(activity);
+        requireNonNull(builder);
+        requireNonNull(url);
+        setupLearnMoreButton(builder, () -> LAUNCH_HELP_PAGE.accept(activity, url));
+    }
+
+    private void setupLearnMoreButton(AlertDialog.Builder builder, Runnable runnable) {
+        builder.setNeutralButton(R.string.learn_more, (dialog, which) -> {
+            runnable.run();
+        });
+    }
+
+    private static void launchLearnMoreHelpPage(Activity activity, String url) {
+        activity.startActivityAsUser(createLearnMoreIntent(url), UserHandle.SYSTEM);
+    }
+
+    private static Intent createLearnMoreIntent(String url) {
+        final Intent intent = new Intent(Intent.ACTION_VIEW, Uri.parse(url));
+        intent.setFlags(Intent.FLAG_ACTIVITY_NEW_TASK
+                | Intent.FLAG_ACTIVITY_EXCLUDE_FROM_RECENTS);
+        return intent;
+    }
+
+    private static void showAdminPolicies(
+            EnforcedAdmin enforcedAdmin,
+            Activity activity) {
+        final Intent intent = new Intent();
+        if (enforcedAdmin.component != null) {
+            intent.setClass(activity, DeviceAdminAdd.class);
+            intent.putExtra(DevicePolicyManager.EXTRA_DEVICE_ADMIN,
+                    enforcedAdmin.component);
+            intent.putExtra(DeviceAdminAdd.EXTRA_CALLED_FROM_SUPPORT_DIALOG, true);
+            // DeviceAdminAdd class may need to run as managed profile.
+            activity.startActivityAsUser(intent, enforcedAdmin.user);
+        } else {
+            intent.setClass(activity, Settings.DeviceAdminSettingsActivity.class);
+            intent.addFlags(Intent.FLAG_ACTIVITY_NEW_TASK);
+            // Activity merges both managed profile and parent users
+            // admins so show as same user as this activity.
+            activity.startActivity(intent);
+        }
+    }
+}