Add bit per sample preference for Bluetooth developer option

Bug: 142227996
Test: make -j50 RunSettingsRoboTests
Change-Id: Idaf9be96f4e48acf46cbf53ae7f7d100db002c7c

tests/robotests/src/com/android/settings/development/bluetooth/BluetoothBitPerSampleDialogPreferenceTest.java

@@ -0,0 +1,50 @@
+/*
+ * Copyright (C) 2019 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.development.bluetooth;
+
+import static com.google.common.truth.Truth.assertThat;
+
+import android.content.Context;
+
+import com.android.settings.R;
+
+import org.junit.Before;
+import org.junit.Test;
+import org.junit.runner.RunWith;
+import org.mockito.MockitoAnnotations;
+import org.robolectric.RobolectricTestRunner;
+import org.robolectric.RuntimeEnvironment;
+
+@RunWith(RobolectricTestRunner.class)
+public class BluetoothBitPerSampleDialogPreferenceTest {
+
+    private BluetoothBitPerSampleDialogPreference mPreference;
+    private Context mContext;
+
+    @Before
+    public void setup() {
+        MockitoAnnotations.initMocks(this);
+        mContext = RuntimeEnvironment.application;
+        mPreference = new BluetoothBitPerSampleDialogPreference(mContext);
+    }
+
+    @Test
+    public void getRadioButtonGroupId() {
+        assertThat(mPreference.getRadioButtonGroupId())
+                .isEqualTo(R.id.bluetooth_audio_bit_per_sample_radio_group);
+    }
+}