Summary:
Changes all possible native JNI methods to critical methods.
For now, this only changes Android up and including v7. In order to be prepared for the `CriticalNative` annotation in Android v8, the following restrictions apply:
- Qualifying methods must be static (this is also enforced for Dalvik / Android v4)
- Method implementations can only consume primitive JNI types (`boolean`, jchar`, etc.)
Reviewed By: priteshrnandgaonkar
Differential Revision: D9943868
fbshipit-source-id: 728817eb37822b717fd3daf94cd9f02b42c17db6
6e46eec58f