xds: Make XdsNR.RoutingConfig.empty a constant #11868
Merged
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The field was made final in 4b52639 but was soon reverted in 3ebb3e1 because of what I assume was a bad merge conflict resolution. The field has contained an immutable object since its introduction in d25f5ac, so it is pretty likely to remain a constant in the future.
CC @larry-safran