Describe what happened

In following scenario, I expected to get the performance timing only for the screen home and item. But the SDK reported the timing with not only screens but also ApplicationLaunch

Setup:
Create a sample app that has 2 screens called home and item.
Add a performance timing to measure Compose rendering performance.
Add some network calls in Application::onCreate().

Scenario:

1. Open the app
   • a timing for home screen will be reported
2. Navigate to item screen
   • a timing for item screen and ApplicationLaunch will be reported <- !?

Steps to reproduce the issue:

Clone this PR and run the sample Kotlin app.
ken-kentan#1

Describe what you expected:

Performance Timing won't be sent with ApplicationLaunch scope.

Additional context

• Android OS version: Any
• Device Model: Any
• Datadog SDK version: develop
• Versions of any other relevant dependencies (OkHttp, …): OkHttp
• Proguard configuration: Any
• Gradle Plugins: Any