Summary:
@public
The bridge may send the reload event twice when reloading JS in some rare condition. The 2nd one was actually when the "new" bridge wasn't valid yet, so log an error if that happens. This may happen if the connection to Metro server gets into a weird state. Restarting Metro would solve the problem.
The issue was that `RCTBridgeWillReloadNotification` fired twice for each reload with metro connected.
Reviewed By: mmmulani
Differential Revision: D8509448
fbshipit-source-id: 647fb98c0a97503409a10451b8f152145947ae20