Add SafetyCenter entry to Settings.

Test: atest SettingsUnitTests
Bug: 204978295
Change-Id: I9bedb58ad740b4ee76620e04675a0aefa659566a

src/com/android/settings/safetycenter/TopLevelSafetyCenterEntryPreferenceController.java

@@ -0,0 +1,60 @@
+/*
+ * 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.safetycenter;
+
+import android.content.ActivityNotFoundException;
+import android.content.Context;
+import android.content.Intent;
+import android.text.TextUtils;
+import android.util.Log;
+
+import androidx.preference.Preference;
+
+import com.android.settings.core.BasePreferenceController;
+
+/** Controller for the SafetyCenter entry in top level Settings. */
+public class TopLevelSafetyCenterEntryPreferenceController extends BasePreferenceController {
+
+    private static final String TAG = "TopLevelSafetyCenterEntryPreferenceController";
+
+    public TopLevelSafetyCenterEntryPreferenceController(Context context, String preferenceKey) {
+        super(context, preferenceKey);
+    }
+
+    @Override
+    public int getAvailabilityStatus() {
+        if (SafetyCenterStatus.isEnabled()) {
+            return AVAILABLE;
+        }
+        return CONDITIONALLY_UNAVAILABLE;
+    }
+
+    @Override
+    public boolean handlePreferenceTreeClick(Preference preference) {
+        if (!TextUtils.equals(preference.getKey(), getPreferenceKey())) {
+            return super.handlePreferenceTreeClick(preference);
+        }
+
+        try {
+            mContext.startActivity(new Intent(Intent.ACTION_SAFETY_CENTER));
+        } catch (ActivityNotFoundException e) {
+            Log.e(TAG, "Unable to open safety center", e);
+            return false;
+        }
+        return true;
+    }
+}