Sync the Bluetooth name and address from the Bluetooth Adapter

It looks like the synchronization of the Bluetooth name and address
from the Bluetooth Adapter has been removed by the following commit
without an explanation:

  Bluetooth LE background operation mode (2/2)

As a result, the BluetoothManagerService.mAddress was always null.

Bug: 20545952
Change-Id: I595f370e06e17b2c67ce511f793efdee7674598c

services/core/java/com/android/server/BluetoothManagerService.java

@@ -237,6 +237,12 @@ class BluetoothManagerService extends IBluetoothManager.Stub {
                         sendEnableMsg(mQuietEnableExternal);
                     }
                 }
+
+                if (!isNameAndAddressSet()) {
+                    // Sync the Bluetooth name and address from the Bluetooth Adapter
+                    if (DBG) Log.d(TAG,"Retrieving Bluetooth Adapter name and address...");
+                    getNameAndAddress();
+                }
             }
         }
     };