[core/primitive][composeEventHandlers] Replace `checkForDefaultPrevented` api

[andy-hook]

Internally, the checkForDefaultPrevented api makes event composition difficult to follow. The suggested path is to split this out into two utils:

composeEvent
composePreventableEvent
(naming tbd)

In rare occurrences where we have a mixture of preventable and non-preventable handlers, multiple composition is preferred to better communicate the intent:

onBlur={composePreventableEvent(
  composeEvent(props.onBlur, context.onNotPreventableEvent), 
  context.onPreventableEvent
)}