Add preferences in new connected device page

1. Add device preference
2. connection preference

This cl add click action for Add device preference. Action for
connection preference will be added in future cl.

Bug: 69333961
Test: Screenshot | RunSettingsRoboTests
Change-Id: Ifb1afc8371ee45165ea22a7a195a774ba04fdeea

tests/robotests/src/com/android/settings/bluetooth/BluetoothPairingDetailTest.java

@@ -31,7 +31,6 @@ import static org.mockito.Mockito.verify;
 import android.bluetooth.BluetoothAdapter;
 import android.content.Context;
 import android.content.res.Resources;
-import android.os.UserManager;
 import android.support.v7.preference.PreferenceGroup;
 
 import com.android.settings.R;
@@ -55,8 +54,6 @@ import org.robolectric.annotation.Config;
 @Config(manifest = TestConfig.MANIFEST_PATH, sdk = TestConfig.SDK_VERSION_O)
 public class BluetoothPairingDetailTest {
 
-    @Mock
-    private UserManager mUserManager;
     @Mock
     private Resources mResource;
     @Mock
@@ -133,6 +130,25 @@ public class BluetoothPairingDetailTest {
         verify(mFragment).finish();
     }
 
+    @Test
+    public void testUpdateBluetooth_bluetoothOff_turnOnBluetooth() {
+        doReturn(false).when(mLocalAdapter).isEnabled();
+
+        mFragment.updateBluetooth();
+
+        verify(mLocalAdapter).enable();
+    }
+
+    @Test
+    public void testUpdateBluetooth_bluetoothOn_updateState() {
+        doReturn(true).when(mLocalAdapter).isEnabled();
+        doNothing().when(mFragment).updateContent(anyInt());
+
+        mFragment.updateBluetooth();
+
+        verify(mFragment).updateContent(anyInt());
+    }
+
     @Test
     public void testOnScanningStateChanged_restartScanAfterInitialScanning() {
         mFragment.mAvailableDevicesCategory = mAvailableDevicesCategory;
@@ -181,6 +197,4 @@ public class BluetoothPairingDetailTest {
         verify(mAvailableDevicesCategory, times(1)).removeAll();
     }
 
-
-
 }