[Bugfix] Fix compling error when enable LOG_REFS in system/libhwbinder/Parcel.cpp

Like change 1806797, we also try to fix the same compling problem in system/libhwbinder/Parcel.cpp when we enable LOG_REFS.

Change-Id: I74d0f6433791135945b4901108560a5c240e764e
Test: manual
1 file changed