avoid duplicating advertisement of NEW_CONNECTION_ID frames #100

Job	Run time
docker	1m 58s
nginx (1.16.1)	45s
android_ndk_lts (aarch64-linux-android)	1m 21s
http3_test	1m 4s
android_ndk_lts (armv7-linux-androideabi)	1m 26s
quiche	59s
android_ndk_lts (x86_64-linux-android)	1m 26s
quiche_ios (x86_64-apple-ios)	1m 30s
quiche (boringssl-boring-crate)	1m 5s
quiche_macos	1m 41s
android_ndk_lts (i686-linux-android)	1m 26s
quiche_ios (aarch64-apple-ios)	2m 18s
quiche_multiarch (aarch64-unknown-linux-gnu)	2m 5s
quiche_windows (x86_64-pc-windows-msvc)	42s
quiche_multiarch (armv7-unknown-linux-gnueabihf)	2m 6s
quiche_windows (i686-pc-windows-msvc)	36s
quiche_multiarch (i686-unknown-linux-gnu)	2m 0s
quiche_windows (x86_64-pc-windows-gnu)	40s
quiche_windows (i686-pc-windows-gnu)	45s
	25m 53s

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