grpc_graph_fuzzer: Tag-mismatch in android::automotive::computepipe::graph::GrpcGraph::dispatchGraphTerminationMess

In dispatchGraphTerminationMessage() of packages/services/Car/computepipe/runner/graph/StreamSetObserver.cpp, there is a possible use after free due to a race condition. This could lead to local escalation of privilege with User execution privileges needed. User interaction is not needed for exploitation.