fix(bluetooth-classic): uses the device address as default name

Previously these lines of code may have resulted in an error, as the
matches objects may be undefined.

src/integrations/bluetooth-classic/bluetooth-classic.service.spec.ts

@@ -195,6 +195,20 @@ Requesting information ...
     });
   });
 
+  it('should return the address as device name if none was found', async () => {
+    jest.spyOn(util, 'promisify').mockImplementation(() => {
+      return jest.fn().mockResolvedValue({
+        stdout: 'IO error'
+      });
+    });
+
+    expect(await service.inquireDeviceInfo('F0:99:B6:12:34:AB')).toStrictEqual({
+      address: 'F0:99:B6:12:34:AB',
+      name: 'F0:99:B6:12:34:AB',
+      manufacturer: undefined
+    });
+  });
+
   it('should return barebones information if request fails', async () => {
     jest.spyOn(util, 'promisify').mockImplementation(() => {
       return jest.fn().mockRejectedValue({ stderr: 'I/O Error' });

src/integrations/bluetooth-classic/bluetooth-classic.service.ts

@@ -216,8 +216,8 @@ export class BluetoothClassicService extends KalmanFilterable(Object, 1.4, 1)
 
       return {
         address,
-        name: nameMatches[1],
-        manufacturer: manufacturerMatches[1]
+        name: nameMatches ? nameMatches[1] : address,
+        manufacturer: manufacturerMatches ? manufacturerMatches[1] : undefined
       };
     } catch (e) {
       this.logger.error(e.message, e.stack);