Adds SecuritySetting feature for providing an alternative SecuritySettings fragment

Bug: 181764224
Test: New tests added to SettingsUnitTests.
Test: Tested manually with and without feature-provided fragment.
Test: No new failures in SettingsUnitTests, or robolectric. No failures in security directory of robolectric tests.
Change-Id: I21038baf3098c18e1713a332085a5efc376f73da

tests/unit/src/com/android/settings/security/SecuritySettingsFeatureProviderImplTest.java

@@ -0,0 +1,49 @@
+/*
+ * 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.security;
+
+import static com.google.common.truth.Truth.assertThat;
+
+import androidx.test.ext.junit.runners.AndroidJUnit4;
+
+import org.junit.Before;
+import org.junit.Test;
+import org.junit.runner.RunWith;
+
+@RunWith(AndroidJUnit4.class)
+public class SecuritySettingsFeatureProviderImplTest {
+
+    private SecuritySettingsFeatureProviderImpl mSecuritySettingsFeatureProvider;
+
+    @Before
+    public void setUp() {
+        mSecuritySettingsFeatureProvider = new SecuritySettingsFeatureProviderImpl();
+    }
+
+    @Test
+    public void hasAlternativeSecuritySettingsFragment_returnsFalse() {
+        assertThat(mSecuritySettingsFeatureProvider.hasAlternativeSecuritySettingsFragment())
+                .isFalse();
+    }
+
+    @Test
+    public void getAlternativeSecuritySettingsFragmentClassname_returnsNull() {
+        String alternativeFragmentClassname =
+                mSecuritySettingsFeatureProvider.getAlternativeSecuritySettingsFragmentClassname();
+        assertThat(alternativeFragmentClassname).isNull();
+    }
+}