Revert "Delete Fast Pair Settings"

This reverts commit 3438e20da1.

Reason for revert: Fast Pair Project is resumed

Test: loaded on device
Change-Id: I54f68794be9c527c5c873e301aada51bcdb6e298

tests/unit/src/com/android/settings/nearby/FastPairPreferenceControllerTest.java

@@ -0,0 +1,52 @@
+/*
+ * 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.nearby;
+
+import static com.google.common.truth.Truth.assertThat;
+
+import static org.mockito.Mockito.spy;
+
+import android.content.Context;
+import android.os.Looper;
+
+import androidx.test.core.app.ApplicationProvider;
+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 FastPairPreferenceControllerTest {
+
+    private Context mContext;
+    private FastPairPreferenceController mController;
+
+    @Before
+    public void setUp() {
+        mContext = spy(ApplicationProvider.getApplicationContext());
+        mController = new FastPairPreferenceController(mContext);
+        if (Looper.myLooper() == null) {
+            Looper.prepare();
+        }
+    }
+
+    @Test
+    public void isAvailable_shouldBeTrue() {
+        assertThat(mController.isAvailable()).isTrue();
+    }
+}