fix(nullpointer): apply 0.60 npe fix

Author: kenjdavidson

android/src/main/java/kjd/reactnative/bluetooth/RNBluetoothClassicModule.java

@@ -384,9 +384,9 @@ public void requestBluetoothEnabled(Promise promise) {
             promise.resolve(true);
         } else {
             Activity activity = getCurrentActivity();
-            if (activity != null) {
-                mEnabledPromise = promise;
-
+            mEnabledPromise = promise;
+            
+            if (activity != null) {            
                 Intent intent = new Intent(BluetoothAdapter.ACTION_REQUEST_ENABLE);
                 activity.startActivityForResult(intent, BluetoothRequest.ENABLE_BLUETOOTH.code);
             } else {