Copy cached transport parameters and application states instead of using pointers in QUIC 0-RTT setup. There is currently a time gap between looking up the cache and using the cache. During this gap, the cache could be invalidated. Client side change. not protected. PiperOrigin-RevId: 327337399 Change-Id: I04bc99d8cf77b613f635e1da91d75c8269cf9e95