changed AppStartMetrics to use ActivityLifecycleCallbacksAdapter

added app launch foreground check to AppStartMetrics ctor

Author: stefanosiano

sentry-android-core/api/sentry-android-core.api

@@ -425,7 +425,7 @@ public class io/sentry/android/core/performance/ActivityLifecycleTimeSpan : java
 	public final fun getOnStart ()Lio/sentry/android/core/performance/TimeSpan;
 }
 
-public class io/sentry/android/core/performance/AppStartMetrics : android/app/Application$ActivityLifecycleCallbacks {
+public class io/sentry/android/core/performance/AppStartMetrics : io/sentry/android/core/performance/ActivityLifecycleCallbacksAdapter {
 	public fun <init> ()V
 	public fun addActivityLifecycleTimeSpans (Lio/sentry/android/core/performance/ActivityLifecycleTimeSpan;)V
 	public fun clear ()V
@@ -442,12 +442,6 @@ public class io/sentry/android/core/performance/AppStartMetrics : android/app/Ap
 	public fun getSdkInitTimeSpan ()Lio/sentry/android/core/performance/TimeSpan;
 	public fun isAppLaunchedInForeground ()Z
 	public fun onActivityCreated (Landroid/app/Activity;Landroid/os/Bundle;)V
-	public fun onActivityDestroyed (Landroid/app/Activity;)V
-	public fun onActivityPaused (Landroid/app/Activity;)V
-	public fun onActivityResumed (Landroid/app/Activity;)V
-	public fun onActivitySaveInstanceState (Landroid/app/Activity;Landroid/os/Bundle;)V
-	public fun onActivityStarted (Landroid/app/Activity;)V
-	public fun onActivityStopped (Landroid/app/Activity;)V
 	public static fun onApplicationCreate (Landroid/app/Application;)V
 	public static fun onApplicationPostCreate (Landroid/app/Application;)V
 	public static fun onContentProviderCreate (Landroid/content/ContentProvider;)V

sentry-android-core/src/main/java/io/sentry/android/core/performance/AppStartMetrics.java

@@ -32,7 +32,7 @@
  * transformed into SDK specific txn/span data structures.
  */
 @ApiStatus.Internal
-public class AppStartMetrics implements Application.ActivityLifecycleCallbacks {
+public class AppStartMetrics extends ActivityLifecycleCallbacksAdapter {
 
   public enum AppStartType {
     UNKNOWN,
@@ -76,6 +76,7 @@ public AppStartMetrics() {
     applicationOnCreate = new TimeSpan();
     contentProviderOnCreates = new HashMap<>();
     activityLifecycles = new ArrayList<>();
+    appLaunchedInForeground = ContextUtils.isForegroundImportance();
   }
 
   /**
@@ -223,7 +224,8 @@ public static void onApplicationCreate(final @NotNull Application application) {
     if (instance.applicationOnCreate.hasNotStarted()) {
       instance.applicationOnCreate.setStartedAt(now);
       application.registerActivityLifecycleCallbacks(instance);
-      instance.appLaunchedInForeground = ContextUtils.isForegroundImportance();
+      instance.appLaunchedInForeground =
+          instance.appLaunchedInForeground || ContextUtils.isForegroundImportance();
       new Handler(Looper.getMainLooper())
           .post(
               () -> {
@@ -255,24 +257,6 @@ public void onActivityCreated(@NonNull Activity activity, @Nullable Bundle saved
     }
   }
 
-  @Override
-  public void onActivityStarted(@NonNull Activity activity) {}
-
-  @Override
-  public void onActivityResumed(@NonNull Activity activity) {}
-
-  @Override
-  public void onActivityPaused(@NonNull Activity activity) {}
-
-  @Override
-  public void onActivityStopped(@NonNull Activity activity) {}
-
-  @Override
-  public void onActivitySaveInstanceState(@NonNull Activity activity, @NonNull Bundle outState) {}
-
-  @Override
-  public void onActivityDestroyed(@NonNull Activity activity) {}
-
   /**
    * Called by instrumentation
    *