Add flag count for quic_stop_sending_uses_ietf_error_code.
I forgot to add it in cl/331000553.
PiperOrigin-RevId: 331165541
Change-Id: I5e04cfa8d8787d2aea468859ae66c62861604670
QUICHE (QUIC, Http/2, Etc) is Google‘s implementation of QUIC and related protocols. It powers Chromium as well as Google’s QUIC servers and some other projects.