fix: screen event - Githubissues

Description

Set default flag value to false for the Automatic Screen Event.
Send default property (i.e., automatic to true) for the Automatic Screen Event. Also, add a unit test case for the Automatic Screen Event.
Allow setting of eventName in screen event. This property will be set in the root as follows:
```
"event": "mainview.MainActivity"
```
Also fixed a few failing test cases related to the screen event.

[x] Bug fix (non-breaking change which fixes an issue)
[ ] New feature (non-breaking change which adds functionality)
[ ] Breaking change (fix or feature that would cause existing functionality to not work as expected)
[ ] This change requires a documentation update
Checklist:
[ ] Version upgraded (project, README, gradle, podspec etc)
[ ] My code follows the style guidelines of this project
[ ] I have performed a self-review of my own code
[ ] I have commented my code, particularly in hard-to-understand areas
[ ] I have added unit tests for the code
[ ] I have made corresponding changes to the documentation