fix(messaging, android): prevent OOM by limiting stored notifications

Author: sean5940

packages/messaging/android/src/main/java/io/invertase/firebase/messaging/ReactNativeFirebaseMessagingStoreImpl.java

@@ -18,8 +18,31 @@
 public class ReactNativeFirebaseMessagingStoreImpl implements ReactNativeFirebaseMessagingStore {
 
   private static final String S_KEY_ALL_NOTIFICATION_IDS = "all_notification_ids";
-  private static final int MAX_SIZE_NOTIFICATIONS = 100;
   private final String DELIMITER = ",";
+  private static int MAX_SIZE_NOTIFICATIONS = 20;
+  private static boolean isInitialized = false;
+
+  private int getMaxNotificationSize() {
+    if (isInitialized) return MAX_SIZE_NOTIFICATIONS;
+    try {
+      android.content.Context context =
+          io.invertase.firebase.app.ReactNativeFirebaseApp.getApplicationContext();
+      android.content.pm.ApplicationInfo appInfo =
+          context
+              .getPackageManager()
+              .getApplicationInfo(
+                  context.getPackageName(), android.content.pm.PackageManager.GET_META_DATA);
+      if (appInfo.metaData != null) {
+        int configValue =
+            appInfo.metaData.getInt("rn_firebase_messaging_max_stored_notifications", 20);
+        MAX_SIZE_NOTIFICATIONS = Math.min(configValue, 100);
+      }
+    } catch (Exception e) {
+      // Ignore and use default
+    }
+    isInitialized = true;
+    return MAX_SIZE_NOTIFICATIONS;
+  }
 
   @Override
   public void storeFirebaseMessage(RemoteMessage remoteMessage) {
@@ -35,10 +58,11 @@ public void storeFirebaseMessage(RemoteMessage remoteMessage) {
 
       // check and remove old notifications message
       List<String> allNotificationList = convertToArray(notifications);
-      if (allNotificationList.size() > MAX_SIZE_NOTIFICATIONS) {
+      while (allNotificationList.size() > getMaxNotificationSize()) {
         String firstRemoteMessageId = allNotificationList.get(0);
         preferences.remove(firstRemoteMessageId);
         notifications = removeRemoteMessage(firstRemoteMessageId, notifications);
+        allNotificationList.remove(0);
       }
       preferences.setStringValue(S_KEY_ALL_NOTIFICATION_IDS, notifications);
     } catch (JSONException e) {