Add Incubating annotation to indicate unstable APIs

android-agent/api/android-agent.api

@@ -1,3 +1,6 @@
+public abstract interface annotation class io/opentelemetry/android/Incubating : java/lang/annotation/Annotation {
+}
+
 public final class io/opentelemetry/android/agent/OpenTelemetryRumInitializer {
 	public static final field INSTANCE Lio/opentelemetry/android/agent/OpenTelemetryRumInitializer;
 	public static final fun initialize (Landroid/app/Application;Ljava/lang/String;Ljava/util/Map;Lio/opentelemetry/android/agent/connectivity/EndpointConnectivity;Lio/opentelemetry/android/agent/connectivity/EndpointConnectivity;Lio/opentelemetry/android/agent/connectivity/EndpointConnectivity;Lio/opentelemetry/android/config/OtelRumConfig;Lio/opentelemetry/android/agent/session/SessionConfig;Lkotlin/jvm/functions/Function1;)Lio/opentelemetry/android/OpenTelemetryRum;
@@ -65,15 +68,8 @@ public final class io/opentelemetry/android/agent/session/SessionConfig {
 	public static final field Companion Lio/opentelemetry/android/agent/session/SessionConfig$Companion;
 	public synthetic fun <init> (JJILkotlin/jvm/internal/DefaultConstructorMarker;)V
 	public synthetic fun <init> (JJLkotlin/jvm/internal/DefaultConstructorMarker;)V
-	public final fun component1-UwyO8pc ()J
-	public final fun component2-UwyO8pc ()J
-	public final fun copy-QTBD994 (JJ)Lio/opentelemetry/android/agent/session/SessionConfig;
-	public static synthetic fun copy-QTBD994$default (Lio/opentelemetry/android/agent/session/SessionConfig;JJILjava/lang/Object;)Lio/opentelemetry/android/agent/session/SessionConfig;
-	public fun equals (Ljava/lang/Object;)Z
 	public final fun getBackgroundInactivityTimeout-UwyO8pc ()J
 	public final fun getMaxLifetime-UwyO8pc ()J
-	public fun hashCode ()I
-	public fun toString ()Ljava/lang/String;
 	public static final fun withDefaults ()Lio/opentelemetry/android/agent/session/SessionConfig;
 }
 

android-agent/src/main/kotlin/io/opentelemetry/android/Incubating.kt

@@ -0,0 +1,23 @@
+/*
+ * Copyright The OpenTelemetry Authors
+ * SPDX-License-Identifier: Apache-2.0
+ */
+
+package io.opentelemetry.android
+
+/**
+ * Marks an API as incubating. Incubating APIs can be subject to breaking change without warning
+ * between versions, and require an opt-in annotation to prevent compiler warnings.
+ *
+ * This annotation is intended for use on opentelemetry-android's API only and should not be used
+ * by library consumers on their own code.
+ */
+@RequiresOptIn(level = RequiresOptIn.Level.WARNING)
+@Retention(AnnotationRetention.BINARY)
+@Target(
+    AnnotationTarget.CLASS,
+    AnnotationTarget.FUNCTION,
+    AnnotationTarget.PROPERTY,
+    AnnotationTarget.TYPEALIAS,
+)
+annotation class Incubating

android-agent/src/main/kotlin/io/opentelemetry/android/agent/OpenTelemetryRumInitializer.kt

@@ -6,6 +6,7 @@
 package io.opentelemetry.android.agent
 
 import android.app.Application
+import io.opentelemetry.android.Incubating
 import io.opentelemetry.android.OpenTelemetryRum
 import io.opentelemetry.android.OpenTelemetryRumBuilder
 import io.opentelemetry.android.agent.connectivity.EndpointConnectivity
@@ -35,6 +36,7 @@ import io.opentelemetry.exporter.otlp.http.trace.OtlpHttpSpanExporter
 import kotlin.time.Duration
 import kotlin.time.toJavaDuration
 
+@OptIn(Incubating::class)
 object OpenTelemetryRumInitializer {
     /**
      * Opinionated [OpenTelemetryRum] initialization.

android-agent/src/main/kotlin/io/opentelemetry/android/agent/session/SessionConfig.kt

@@ -5,11 +5,13 @@
 
 package io.opentelemetry.android.agent.session
 
+import io.opentelemetry.android.Incubating
 import kotlin.time.Duration
 import kotlin.time.Duration.Companion.hours
 import kotlin.time.Duration.Companion.minutes
 
-data class SessionConfig(
+@Incubating
+class SessionConfig(
     val backgroundInactivityTimeout: Duration = 15.minutes,
     val maxLifetime: Duration = 4.hours,
 ) {