RFR: 8295370: Update java.io.ObjectStreamField to use Class.descriptorString

[Brian Burkhalter]

On Fri, 14 Oct 2022 18:23:58 GMT, Roger Riggs <rriggs at openjdk.org> wrote:

> The code in ObjectStreamField for constructing type signatures should be replaced by Class.descriptorString(). 
> The corresponding change is made in ObjectStreamClass.
> There is no change to the contents of the type strings and the existing tests will cover it.

Approved. I hit the wrong radio button before.

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Marked as reviewed by bpb (Reviewer).

PR: https://git.openjdk.org/jdk/pull/10714