Protobuf payload deserialization #259
Description
UMessage:: assumes UPayloadFormat::UPAYLOAD_FORMAT_UNSPECIFIED to be synonymous with UPayloadFormat::UPAYLOAD_FORMAT_PROTOBUF_WRAPPED_IN_ANY when deserializing the message payload.
However, the outcome of eclipse-uprotocol/up-spec#237 was to not consider these payload formats as synonymous (anymore). The code needs to be adapted accordingly.