Fix integer overflow when computing outgoing_max_streams_
Fix integer overflow when computing outgoing_max_streams_

gfe-relnote: fix integer overflow in code gated by QUIC_VERSION_99
PiperOrigin-RevId: 249221642
Change-Id: Ia354d99b218d81bcf6b390c90e4d6aad533dd7fe

google/quiche,google/quiche,google/quiche,google/quiche