message: chore: merge changelog info
diff: ### Bug Fixes
  * **router:** routing services should be provided in forRoot only ([#1729](https://github.com/NativeScript/nativescript-angular/issues/1729)) ([0f6a975](https://github.com/NativeScript/nativescript-angular/commit/0f6a975))
  -* on destroy remove the lastBootstrappedModule ([5e13263](https://github.com/NativeScript/nativescript-angular/commit/5e13263))
  -* page might be null'ed before clearHistory's navigatedToEvent ([ea66985](https://github.com/NativeScript/nativescript-angular/commit/ea66985))
  -* remove rootContent on exit ([14e787f](https://github.com/NativeScript/nativescript-angular/commit/14e787f))
  -* the exit event is triggered on restart ([3dffbd5](https://github.com/NativeScript/nativescript-angular/commit/3dffbd5))
  +* ngOnDestroy not called on Android back button ([#923](https://github.com/NativeScript/nativescript-angular/issues/923))
  ### Features
  