Supply status on GATT close

aosp/1479124 removed the status variables since they were unused.
aosp/1496554 put them back but hardcoded them to GATT_SUCCESS.

I don't know how this ever worked, since in the initial commit
we read p_data.status to pass to JNI, but populated p_data->close.status.

Nonetheless, this should restore expected behavior.

Test: manual
Bug: 255975734

Change-Id: Ic802ce090172971e7e725abe3bb11446daffe604