RFR: 8275075: Remove unnecessary conversion to String in jdk.hotspot.agent

[Serguei Spitsyn]

On Sun, 3 Oct 2021 18:58:50 GMT, Andrey Turbanov <duke at openjdk.java.net> wrote:

> Cleanup unnecessary toString() calls when conversion will happen implicitly anyway

Looks good.
Thanks,
Serguei

-------------

Marked as reviewed by sspitsyn (Reviewer).

PR: https://git.openjdk.java.net/jdk/pull/5800