[Transition Tracing] Refactor commitTransitionProgress

[lunaruan]

Refactor commitTransitionProgress into two functions, commitOffscreenTransitionHide and commitOffscreenTransitionShow

[sizebot]

Comparing: e193be8...511c425

Critical size changes

Includes critical production bundles, as well as any change greater than 2%:

Name	+/-	Base	Current	+/- gzip	Base gzip	Current gzip
oss-stable/react-dom/cjs/react-dom.production.min.js	=	134.09 kB	134.09 kB	=	42.93 kB	42.93 kB
oss-experimental/react-dom/cjs/react-dom.production.min.js	=	139.65 kB	139.65 kB	=	44.55 kB	44.55 kB
facebook-www/ReactDOM-prod.classic.js	=	474.97 kB	474.85 kB	=	84.88 kB	84.83 kB
facebook-www/ReactDOM-prod.modern.js	=	460.21 kB	460.09 kB	=	82.64 kB	82.59 kB
facebook-www/ReactDOMForked-prod.classic.js	=	474.97 kB	474.85 kB	=	84.88 kB	84.83 kB

Significant size changes

Includes any change greater than 0.2%:

(No significant changes)

Generated by 🚫 dangerJS against 511c425