tree ab27a180067be18dde9d6cc28eaa95c2496c7fe9
parent 9c41f8ba236188d2cbf8560fbc9e0fa907742583
author fayang <fayang@google.com> 1604093864 -0700
committer Copybara-Service <copybara-worker@google.com> 1604093908 -0700

Use ScopedEncryptionLevelContext to send data from QuicConnection and QuicSession.

This CL makes more widespread use of ScopedEncryptionLevelContext to explicitly set the default encryption level on a QuicConnection for all data sent, apart from ACK-only packets in gQUIC.

For QuicSession, the sending data includes control frames, messages, stream data and crypto data.
For QuicConnection, the sending data includes PING, CONNECTION_CLOSE and ACK frame (for multiple packet number spaces).

Protected by FLAGS_quic_reloadable_flag_quic_use_encryption_level_context.

PiperOrigin-RevId: 339942006
Change-Id: Ibd8b56cafded3c713c30fe5981c8b5d0aeb30afc