Make Bluetooth settings page can be discoverable

Bug: 118760361
Test: make -j42 RunSettingsRoboTests
Change-Id: I2f663197f3c0f6c58529609845bab4dd7e714348

src/com/android/settings/bluetooth/BluetoothSwitchPreferenceController.java

@@ -46,6 +46,9 @@ public class BluetoothSwitchPreferenceController
     private Context mContext;
     private FooterPreference mFooterPreference;
 
+    @VisibleForTesting
+    AlwaysDiscoverable mAlwaysDiscoverable;
+
     public BluetoothSwitchPreferenceController(Context context,
             SwitchWidgetController switchController,
             FooterPreference footerPreference) {
@@ -69,11 +72,13 @@ public class BluetoothSwitchPreferenceController
                 SettingsEnums.ACTION_SETTINGS_MASTER_SWITCH_BLUETOOTH_TOGGLE,
                 mRestrictionUtils);
         mBluetoothEnabler.setToggleCallback(this);
+        mAlwaysDiscoverable = new AlwaysDiscoverable(context);
     }
 
     @Override
     public void onStart() {
         mBluetoothEnabler.resume(mContext);
+        mAlwaysDiscoverable.start();
         if (mSwitch != null) {
             updateText(mSwitch.isChecked());
         }
@@ -82,6 +87,7 @@ public class BluetoothSwitchPreferenceController
     @Override
     public void onStop() {
         mBluetoothEnabler.pause();
+        mAlwaysDiscoverable.stop();
     }
 
     @Override

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

@@ -19,6 +19,7 @@ package com.android.settings.bluetooth;
 import static com.google.common.truth.Truth.assertThat;
 
 import static org.mockito.Mockito.spy;
+import static org.mockito.Mockito.verify;
 
 import android.content.Context;
 import android.provider.Settings;
@@ -47,6 +48,8 @@ public class BluetoothSwitchPreferenceControllerTest {
     private RestrictionUtils mRestrictionUtils;
     @Mock
     private SwitchWidgetController mSwitchController;
+    @Mock
+    private AlwaysDiscoverable mAlwaysDiscoverable;
 
     private FooterPreference mFooterPreference;
     private Context mContext;
@@ -62,6 +65,7 @@ public class BluetoothSwitchPreferenceControllerTest {
         mController =
             new BluetoothSwitchPreferenceController(mContext, mRestrictionUtils,
                     mSwitchController, mFooterPreference);
+        mController.mAlwaysDiscoverable = mAlwaysDiscoverable;
     }
 
     @Test
@@ -103,4 +107,18 @@ public class BluetoothSwitchPreferenceControllerTest {
 
         assertThat(mFooterPreference.getTitle()).isEqualTo(BLUETOOTH_INFO_STRING);
     }
+
+    @Test
+    public void onStart_shouldStartAlwaysDiscoverable() {
+        mController.onStart();
+
+        verify(mAlwaysDiscoverable).start();
+    }
+
+    @Test
+    public void onStop_shouldStopAlwaysDiscoverable() {
+        mController.onStop();
+
+        verify(mAlwaysDiscoverable).stop();
+    }
 }