IActivityLifecycleHandler 5.4.2 API

```
public interface IActivityLifecycleHandler

                    
```
Implementations of the activity lifecycle handler added via IApplicationService.addActivityLifecycleHandler will be notified throughout the activity lifecycle. This should be used over the Android-provided ActivityLifecycleCallbacks, it provides an abstraction more specific to the OneSignal SDK

Method Summary

Modifier and Type	Method	Description
`abstract Unit`	`onActivityAvailable(Activity activity)`	Called when an activity is made available to the application.
`abstract Unit`	`onActivityStopped(Activity activity)`	Called when an activity has been stopped on an application.

Methods inherited from class java.lang.Object
clone, equals, finalize, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait

- Method Detail
  - onActivityAvailable
```
 abstract Unit onActivityAvailable(Activity activity)
```
    Called when an activity is made available to the application.
  - onActivityStopped
```
 abstract Unit onActivityStopped(Activity activity)
```
    Called when an activity has been stopped on an application.