[TIMOB-15296] Android: Support for window flags

This PR does a few things
1. Exposes a windowsFlags property on WindowProxy for developers to specify extra flags
2. Refactors it Intent processing on BaseActivity so even JS Activities can support these falgs if specified
3. Removes support for deprecated light weight windows 

[JIRA TICKET](https://jira.appcelerator.org/browse/TIMOB-15296)