Fix the error in flush read that was causing jenkins timeout

src/core/ext/transport/cronet/transport/cronet_transport.c

@@ -62,7 +62,7 @@
   } while (0)
 
 /* TODO (makdharma): Hook up into the wider tracing mechanism */
-int grpc_cronet_trace = 0;
+int grpc_cronet_trace = 1;
 
 enum e_op_result {
   ACTION_TAKEN_WITH_CALLBACK,
@@ -272,7 +272,7 @@ static void maybe_flush_read(stream_obj *s) {
   /* Whenever the evaluation of any of the two condition is changed, we check
    * whether we should enter the flush read state. */
   if (s->state.pending_recv_trailing_metadata && s->state.fail_state) {
-    if (!s->state.flush_read) {
+    if (!s->state.flush_read && !s->state.rs.read_stream_closed) {
       CRONET_LOG(GPR_DEBUG, "%p: Flush read", s);
       s->state.flush_read = true;
       null_and_maybe_free_read_buffer(s);