Restore SessionLifecycleService as no-op

firebase-sessions/src/main/AndroidManifest.xml

@@ -17,6 +17,10 @@
   <!--<uses-sdk android:minSdkVersion="21"/>-->
 
   <application>
+    <service
+        android:name="com.google.firebase.sessions.SessionLifecycleService"
+        android:enabled="false"
+        android:exported="false" />
     <service
       android:exported="false"
       android:name="com.google.firebase.components.ComponentDiscoveryService">

firebase-sessions/src/main/kotlin/com/google/firebase/sessions/SessionLifecycleService.kt

@@ -0,0 +1,35 @@
+/*
+ * Copyright 2025 Google LLC
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *     http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+package com.google.firebase.sessions
+
+import android.app.Service
+import android.content.Intent
+
+/**
+ * A no-op implementation of SessionLifecycleService.
+ *
+ * This service was previously used for session management but has been effectively made a no-op as
+ * part of the architectural changes introduced in
+ * [PR #7318](https://github.com/firebase/firebase-android-sdk/pull/7318). It is retained to prevent
+ * `ClassNotFoundException` for older clients that might still have this service declared in their
+ * AndroidManifest.xml or for systems attempting to restart a previously running instance of this
+ * service.
+ */
+internal class SessionLifecycleService : Service() {
+
+  override fun onBind(unused: Intent?) = null
+}