As per RFC 1034/1035, the max size of the label is 63 bytes. It should also be guaranteed when the serviceName is renamed due to the conflict. Bug: 265865456 Test: atest FrameworksNetTests (cherry picked from https://android-review.googlesource.com/q/commit:de802c8dc4f59735730fc24b0ca05a73f92e4bb5) Merged-In: I077d8abdb91071db62b9618d9918e3a12682aaf4 Change-Id: I077d8abdb91071db62b9618d9918e3a12682aaf4