Use 1-RTT instead of 0-RTT write key to send H3 SETTINGs in quic_spdy_stream_test.
Use 1-RTT instead of 0-RTT write key to send H3 SETTINGs in quic_spdy_stream_test.

gfe-relnote: n/a (test only change)
PiperOrigin-RevId: 301652847
Change-Id: Idcf152283975f37f672be1d4ab7522fa5bf4fece

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