Create a API #onActivityLaunched in ActivityInterceptorCallback

Create a new API #onActivityLaunched() which is called when an
activity is successfully launched, and provides the activity
and task information to the interceptor.

Bug: 207596723
Test: testActivityLaunchedCallback_singleCallback
Change-Id: I42d73042d6f213f40f023e42814f73507bcbe7ee
4 files changed