Fix usb menu not switch to "File Transfer/Android Auto" right after connected to car unit

- This CL before usb receiver didn't check the extra
  information of the accessory. It will cause the usb
  menu not to be aware that the usb port is switched
  to accessory mode.

  This CL usb receiver will check intent whether to have
  accessory extra. If the usb port is switched to accessory
  mode the usb menu will switch to "File Transfer/Android Auto".
- Update test case

Bug: 162451162
Test: make -j42 RunSettingsRoboTests
Change-Id: I0eca89a23670c674b74753fc526256cc1d52e759

src/com/android/settings/connecteddevice/usb/UsbConnectionBroadcastReceiver.java

@@ -72,6 +72,9 @@ public class UsbConnectionBroadcastReceiver extends BroadcastReceiver implements
             if (intent.getExtras().getBoolean(UsbManager.USB_FUNCTION_RNDIS)) {
                 functions |= UsbManager.FUNCTION_RNDIS;
             }
+            if (intent.getExtras().getBoolean(UsbManager.USB_FUNCTION_ACCESSORY)) {
+                functions |= UsbManager.FUNCTION_ACCESSORY;
+            }
             mFunctions = functions;
             mDataRole = mUsbBackend.getDataRole();
             mPowerRole = mUsbBackend.getPowerRole();

src/com/android/settings/connecteddevice/usb/UsbDetailsFunctionsController.java

@@ -100,7 +100,11 @@ public class UsbDetailsFunctionsController extends UsbDetailsController
             pref = getProfilePreference(UsbBackend.usbFunctionsToString(option), title);
             // Only show supported options
             if (mUsbBackend.areFunctionsSupported(option)) {
+                if (functions == UsbManager.FUNCTION_ACCESSORY) {
+                    pref.setChecked(UsbManager.FUNCTION_MTP == option);
+                } else {
                     pref.setChecked(functions == option);
+                }
             } else {
                 mProfilesContainer.removePreference(pref);
             }

tests/robotests/src/com/android/settings/connecteddevice/usb/UsbDetailsFunctionsControllerTest.java

@@ -153,6 +153,19 @@ public class UsbDetailsFunctionsControllerTest {
         assertThat(prefs.get(0).isChecked()).isTrue();
     }
 
+    @Test
+    public void displayRefresh_accessoryEnabled_shouldCheckSwitches() {
+        when(mUsbBackend.areFunctionsSupported(anyLong())).thenReturn(true);
+
+        mDetailsFunctionsController.refresh(true, UsbManager.FUNCTION_ACCESSORY, POWER_ROLE_SINK,
+                DATA_ROLE_DEVICE);
+        List<RadioButtonPreference> prefs = getRadioPreferences();
+
+        assertThat(prefs.get(0).getKey())
+                .isEqualTo(UsbBackend.usbFunctionsToString(UsbManager.FUNCTION_MTP));
+        assertThat(prefs.get(0).isChecked()).isTrue();
+    }
+
     @Test
     public void onClickMtp_noneEnabled_shouldEnableMtp() {
         when(mUsbBackend.areFunctionsSupported(anyLong())).thenReturn(true);