chapter 3 -12 Andriod onActivityStartedEvent

[bmargevicius]

onActivityStartedEvent is no longer in use.

change
application.android.onActivityStarted = function () {
to:
application.android.on(application.AndroidApplication.activityStartedEvent, function (args: application.AndroidActivityBundleEventData) {

ref:
https://docs.nativescript.org/core-concepts/application-lifecycle#android-activity-events

[alexziskind1]

Thanks! This has been updated in the 3.1.3 branch in the FinalProject