Use connection's encryption level at QuicCryptoStream::OnCryptoFrame().
Use connection's encryption level at QuicCryptoStream::OnCryptoFrame().

gfe-relnote: Protected by gfe2_reloadable_flag_quic_use_connection_encryption_level
PiperOrigin-RevId: 278414910
Change-Id: I7dacecdcbaa56ac91015dd3066529c8ad10291e9

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