[android] Make sure we always load mapbox-gl when a native method is loaded

Fixes #4175

platform/android/MapboxGLAndroidSDK/src/main/java/com/mapbox/mapboxsdk/offline/OfflineManager.java

@@ -16,6 +16,14 @@ public class OfflineManager {
 
     private final static String LOG_TAG = "OfflineManager";
 
+    //
+    // Static methods
+    //
+
+    static {
+        System.loadLibrary("mapbox-gl");
+    }
+
     // Default database name
     private final static String DATABASE_NAME = "mbgl-offline.db";
 

platform/android/MapboxGLAndroidSDK/src/main/java/com/mapbox/mapboxsdk/offline/OfflineRegion.java

@@ -17,6 +17,14 @@ public class OfflineRegion {
 
     private final static String LOG_TAG = "OfflineRegion";
 
+    //
+    // Static methods
+    //
+
+    static {
+        System.loadLibrary("mapbox-gl");
+    }
+
     // Parent OfflineManager
     private OfflineManager offlineManager;