Summary:
In T94154173, when calling ```EventEmitterWrapper->invoke()```, hybrid function ```invokeEvent``` is null, even if we checked that ```mHybridData``` is valid before calling ```invokeEvent```.
**Theory:**
```invoke()``` is called from ```mqt_js``` thread, ```desotry()``` is called from ```main``` thread, which cause multi-thread access of```mHybridData```.
So if ```desotry()``` is called after ```isValid()``` check and before calling ```invokeEvent()```, ```invokeEvent``` could be destroyed and is null.
I can reproduce with above theory:
{F633411001}
**Fix:**
Make functions synchronized so ```mHybridData``` can be thread safe.
Changelog:
[Android][Fixed] - Make mHybridData thread safe
Reviewed By: RSNara
Differential Revision: D29792453
fbshipit-source-id: 8b4c754d53ece933be7b2cf99c6cd026b39e24ad
Lulu Wu
7929551623