Constructor methods for initializing new session channels. #753

Job	Run time
build_attest_all (buildconfigs/key_xor_test_app.sh)	41m 14s
build_attest_all (buildconfigs/oak_client_android_app.sh)	49m 13s
build_attest_all (buildconfigs/oak_containers_agent.sh)	34m 54s
build_attest_all (buildconfigs/oak_containers_kernel.sh)	34m 12s
build_attest_all (buildconfigs/oak_containers_orchestrator.sh)	47m 42s
build_attest_all (buildconfigs/oak_containers_stage1.sh)	48m 6s
build_attest_all (buildconfigs/oak_containers_syslogd.sh)	48m 33s
build_attest_all (buildconfigs/oak_containers_system_image.sh)	51m 56s
build_attest_all (buildconfigs/oak_containers_nvidia_system_image.sh)	52m 29s
build_attest_all (buildconfigs/oak_echo_enclave_app.sh)	43m 36s
build_attest_all (buildconfigs/oak_echo_raw_enclave_app.sh)	41m 50s
build_attest_all (buildconfigs/oak_functions_enclave_app.sh)	42m 12s
build_attest_all (buildconfigs/oak_functions_insecure_enclave_app.sh)	40m 51s
build_attest_all (buildconfigs/oak_orchestrator.sh)	42m 24s
build_attest_all (buildconfigs/oak_restricted_kernel_simple_io_init_rd_wrapper_bin.sh)	41m 20s
build_attest_all (buildconfigs/stage0_bin.sh)	42m 24s
build_attest_all (buildconfigs/stage0_bin_tdx.sh)	41m 6s
	12h 24m 2s

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