Summary:
An application could either have lazy, or non-lazy modules. This diff simply lets the individual reactPackages decide if they should be lazy or not, based on the variable in `ReactInstanceManagerBuilder`.
This diff also removed the method `setLazyNativeModules()` since an app can now have both native and non-native modules.
Reviewed By: achen1
Differential Revision: D8940026
fbshipit-source-id: 0399f4f39ad57f2b03e4dce117a9e2c28c4ed2b1