[Transition Tracing] Add Passive Flag Whenever Suspense Boundary Toggles

[lunaruan]

Previously, we were only adding the passive flag when we add the Visibility flag, which is only set when we go from primary to fallback. Now, we add the passive flag BOTH when we go from primary to fallback and from fallback to primary.

An alternate solution is to add the passive flag in the same place as the visibility flag in the offscreen complete phase (rather than the suspense complete phase), but this feature is currently only for suspense, and offscreen can be used in different ways, so for now we add the passive flag only in the suspense component's complete phase. We might want to revisit this later when we think about how offscreen should work with transition tracing.

[sizebot]

Comparing: 0568c0f...17ba03d

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	=	131.28 kB	131.28 kB	=	41.94 kB	41.94 kB
oss-experimental/react-dom/cjs/react-dom.production.min.js	=	136.55 kB	136.55 kB	=	43.53 kB	43.53 kB
facebook-www/ReactDOM-prod.classic.js	=	435.21 kB	435.22 kB	=	79.86 kB	79.86 kB
facebook-www/ReactDOM-prod.modern.js	=	420.20 kB	420.22 kB	=	77.49 kB	77.49 kB
facebook-www/ReactDOMForked-prod.classic.js	=	435.21 kB	435.22 kB	=	79.86 kB	79.86 kB

Significant size changes

Includes any change greater than 0.2%:

(No significant changes)

Generated by 🚫 dangerJS against 17ba03d

[acdlite]

Nit: The branch right below can be nested inside of this one so that in the case where there was no change, there are fewer checks.

if (nextDidTimeout !== prevDidTimeout) {
  // Set Passive flag
  if (nextDidTimeout) {
    // Set Visibility flag
  }
}