fix: better package class name regex on Android

[dratwas]

Summary:

Regex that is used for finding class name of ReactPackage doesn't support custom formatting and implementation of more than one interface

Current regex doesn't work for code like this:

class ReactNativeSamplePackage: ReactPackage {
}

because there is no whitespace between ReactNativeSamplePackage and :
Module is not linked also when package class implements other interface before ReactPackage one

class ReactNativeSamplePackage: SomeInterface, NextInterface, ReactPackage {
}

Test Plan:

Green tests
Try autolink module with package class like below

class ReactNativePackage
    : 
  ReactPackage {
    override fun createViewManagers(reactContext: ReactApplicationContext): MutableList<ViewManager<View, ReactShadowNode<*>>> {
        return Collections.emptyList()
    }

    override fun createNativeModules(reactContext: ReactApplicationContext): MutableList<NativeModule> {
        return Collections.emptyList()
    }
}

[thymikee]

Thank you!