feat(android): Add ApplicationStartInfo API support for Android 15+

Author: markushi

CHANGELOG.md

@@ -4,6 +4,11 @@
 
 ### Features
 
+- Add ApplicationStartInfo API support for Android 15+ ([#5055](https://github.com/getsentry/sentry-java/pull/5055))
+  - Captures detailed app startup timing data from Android system
+  - Creates transactions with milestone spans (bind_application, application_oncreate, ttid, ttfd)
+  - Enriches with AppStartMetrics data (content provider spans, class names)
+  - Opt-in via `SentryAndroidOptions.setEnableApplicationStartInfo(boolean)` (disabled by default)
 - Update Android targetSdk to API 36 (Android 16) ([#5016](https://github.com/getsentry/sentry-java/pull/5016))
 
 ### Internal

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

@@ -215,6 +215,12 @@ public final class io/sentry/android/core/ApplicationExitInfoEventProcessor : io
 	public fun process (Lio/sentry/protocol/SentryTransaction;Lio/sentry/Hint;)Lio/sentry/protocol/SentryTransaction;
 }
 
+public final class io/sentry/android/core/ApplicationStartInfoIntegration : io/sentry/Integration, java/io/Closeable {
+	public fun <init> (Landroid/content/Context;Lio/sentry/android/core/BuildInfoProvider;)V
+	public fun close ()V
+	public final fun register (Lio/sentry/IScopes;Lio/sentry/SentryOptions;)V
+}
+
 public final class io/sentry/android/core/BuildConfig {
 	public static final field BUILD_TYPE Ljava/lang/String;
 	public static final field DEBUG Z
@@ -353,6 +359,7 @@ public final class io/sentry/android/core/SentryAndroidOptions : io/sentry/Sentr
 	public fun isEnableActivityLifecycleTracingAutoFinish ()Z
 	public fun isEnableAppComponentBreadcrumbs ()Z
 	public fun isEnableAppLifecycleBreadcrumbs ()Z
+	public fun isEnableApplicationStartInfo ()Z
 	public fun isEnableAutoActivityLifecycleTracing ()Z
 	public fun isEnableAutoTraceIdGeneration ()Z
 	public fun isEnableFramesTracking ()Z
@@ -381,6 +388,7 @@ public final class io/sentry/android/core/SentryAndroidOptions : io/sentry/Sentr
 	public fun setEnableActivityLifecycleTracingAutoFinish (Z)V
 	public fun setEnableAppComponentBreadcrumbs (Z)V
 	public fun setEnableAppLifecycleBreadcrumbs (Z)V
+	public fun setEnableApplicationStartInfo (Z)V
 	public fun setEnableAutoActivityLifecycleTracing (Z)V
 	public fun setEnableAutoTraceIdGeneration (Z)V
 	public fun setEnableFramesTracking (Z)V

sentry-android-core/src/main/java/io/sentry/android/core/AndroidOptionsInitializer.java

@@ -380,6 +380,8 @@ static void installDefaultIntegrations(
       options.addIntegration(new TombstoneIntegration(context));
     }
 
+    options.addIntegration(new ApplicationStartInfoIntegration(context, buildInfoProvider));
+
     // this integration uses android.os.FileObserver, we can't move to sentry
     // before creating a pure java impl.
     options.addIntegration(EnvelopeFileObserverIntegration.getOutboxFileObserver());