Add TLS protocol stitcher #2207

Job	Run time
env-protect-setup	7s
authorize	1s
get-dev-image / get-image	6s
clang-tidy	6m 26s
generate-matrix	3m 44s
code-coverage	0s
build-and-test (Clang opt + UI, nokvm, --config=clang --compilation_mode=opt, bazel_buildables_cl...	2m 9s
build-and-test (Clang debug, nokvm, --config=clang --compilation_mode=dbg, bazel_buildables_clang...	2m 10s
build-and-test (ASAN, nokvm, --config=asan --compilation_mode=dbg, bazel_buildables_sanitizer, ba...	2m 22s
build-and-test (TSAN, nokvm, --config=tsan --compilation_mode=dbg, bazel_buildables_sanitizer, ba...	2m 10s
build-and-test (GCC opt, nokvm, --config=gcc --compilation_mode=opt, bazel_buildables_gcc_opt, ba...	2m 14s
build-and-test-status	1s
	21m 30s

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