React Native sync for revisions a632f7d...2a7bb41

Summary:
This sync includes the following changes:
- **[9a2591681](facebook/react@9a2591681 )**: Fix export //<Sebastian Markbage>//
- **[4a8deb083](facebook/react@4a8deb083 )**: Switch the isPrimaryRender flag based on the stream config ([#21357](facebook/react#21357)) //<Sebastian Markbåge>//
- **[bd4f056a3](facebook/react@bd4f056a3 )**: [Fizz] Implement lazy components and nodes ([#21355](facebook/react#21355)) //<Sebastian Markbåge>//
- **[fc33f12bd](facebook/react@fc33f12bd )**: Remove unstable scheduler/tracing API ([#20037](facebook/react#20037)) //<Brian Vaughn>//
- **[721238394](facebook/react@721238394 )**: Enable strict effects mode for React Native Facebook builds ([#21354](facebook/react#21354)) //<Brian Vaughn>//
- **[48740429b](facebook/react@48740429b )**: Expiration: Do nothing except disable time slicing ([#21345](facebook/react#21345)) //<Andrew Clark>//
- **[0f5ebf366](facebook/react@0f5ebf366 )**: Delete unreferenced type ([#21343](facebook/react#21343)) //<Andrew Clark>//
- **[9cd52b27f](facebook/react@9cd52b27f )**: Restore context after an error happens ([#21341](facebook/react#21341)) //<Sebastian Markbåge>//
- **[ad091759a](facebook/react@ad091759a )**: Revert "Emit reactroot attribute on the first element we discover ([#21154](facebook/react#21154))" ([#21340](facebook/react#21340)) //<Sebastian Markbåge>//
- **[709f94841](facebook/react@709f94841 )**: [Fizz] Add FB specific streaming API and build ([#21337](facebook/react#21337)) //<Sebastian Markbåge>//
- **[e8cdce40d](facebook/react@e8cdce40d )**: Don't flush sync at end of discreteUpdates ([#21327](facebook/react#21327)) //<Andrew Clark>//
- **[a15586001](facebook/react@a15586001 )**: Fix: Don't flush discrete at end of batchedUpdates ([#21229](facebook/react#21229)) //<Andrew Clark>//
- **[89847bf6e](facebook/react@89847bf6e )**: Continuous updates should interrupt transitions ([#21323](facebook/react#21323)) //<Andrew Clark>//
- **[ef37d55b6](facebook/react@ef37d55b6 )**: Use performConcurrentWorkOnRoot for "sync default" ([#21322](facebook/react#21322)) //<Andrew Clark>//

Changelog:
[General][Changed] - React Native sync for revisions a632f7d...2a7bb41

jest_e2e[run_all_tests]

Reviewed By: JoshuaGross

Differential Revision: D28063006

fbshipit-source-id: 7e3535f80961706863b6c2188ee44b5796b2f000

Libraries/Renderer/REVISION

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