Provide a fallback method to load the native library (#10154)

* provide a fallback method to load the native library

* move context call inside loader to avoid changing method signature

platform/android/MapboxGLAndroidSDK/src/main/java/com/mapbox/mapboxsdk/LibraryLoader.java

@@ -1,15 +1,41 @@
 package com.mapbox.mapboxsdk;
 
+import android.content.Context;
+
+import java.io.File;
+
+import timber.log.Timber;
+
 /**
  * Centralises the knowledge about "mapbox-gl" library loading.
  */
 public class LibraryLoader {
 
+  private static final String LIBRARY_NAME = "libmapbox-gl.so";
+
   /**
    * Loads "libmapbox-gl.so" native shared library.
    */
   public static void load() {
-    System.loadLibrary("mapbox-gl");
+    try {
+      System.loadLibrary("mapbox-gl");
+    } catch (UnsatisfiedLinkError error) {
+      Context context = Mapbox.getApplicationContext();
+      if (context != null) {
+        Timber.d("Loading %s from internal storage.", LIBRARY_NAME);
+        System.load(getLibraryLocation(context).getAbsolutePath());
+      }
+    }
   }
 
+  /**
+   * Returns a file in the app internal storage that may contain a locally cached copy
+   * of the Mapbox native library.
+   *
+   * @param context The application context
+   * @return a file object
+   */
+  public static File getLibraryLocation(Context context) {
+    return new File(context.getFilesDir(), LIBRARY_NAME);
+  }
 }