Crashlytics not reporting crashes If unity as library used

Crashlytics is not reporting crashes in unity for below given case
1. Create a null reference/Format exception inside unity
2. Integrate the above unity as a library with android native module(please refer https://blogs.unity3d.com/2019/06/17/add-features-powered-by-unity-to-native-mobile-apps/)
2. Integrate crashlytics in Android native
3. Deploy it on Android device and check if crashes are being reported to Firebase Crashlytics dashboard

### How to reproduce these conditions

**Sample name or URL where you found the bug**

**Failing Function code used (including require/import commands at the top)**

**Steps to set up and reproduce**

**Sample data pasted or attached as JSON (not an image)**

**Security rules used**

### Debug output

**Errors in the [console logs](https://console.firebase.google.com/project/_/functions/logs?search=&severity=DEBUG)**

**Screenshots**

### Expected behavior

### Actual behavior