Change UUIDSerializer to use StreamWriteCapability check instead of JsonGenerator.canWriteBinaryNatively() (3.0)

[cowtowncoder]

With addition of StreamWriteCapability checks, should convert UUIDSerializer as per title.

NOTE: since 2.x does not have access to these capabilities via SerializerProvider -- since it does not get JsonGenerator assigned (but 3.0 has) -- cannot really backport without bigger changes. But should be doable for 3.0.

In 3.0, will first need to add accessor in SerializerProvider for StreamWriteCapability, however.