implemented test and code changes to fix issue #20117, to enable hand…#20191

bbeckercscc wants to merge 1 commit intofacebook:masterfacebook/react:masterfrom

bbeckercscc:20117-improve-dev-experience-when-devtools-hook-is-disabledbbeckercscc/react:20117-improve-dev-experience-when-devtools-hook-is-disabledCopy head branch name to clipboard