Issue 4231 - Fix unstable FilterEngineTest.testSetRemoveFilterChangeCallback

libadblockplus-android/src/org/adblockplus/libadblockplus/JsEngine.java

Index: libadblockplus-android/src/org/adblockplus/libadblockplus/JsEngine.java
diff --git a/libadblockplus-android/src/org/adblockplus/libadblockplus/JsEngine.java b/libadblockplus-android/src/org/adblockplus/libadblockplus/JsEngine.java
index c889cd81d8727718d1ba70008119e5bd54447483..80eb014893f46bd621ccd9377f0ac889e61a491d 100644
--- a/libadblockplus-android/src/org/adblockplus/libadblockplus/JsEngine.java
+++ b/libadblockplus-android/src/org/adblockplus/libadblockplus/JsEngine.java
@@ -78,6 +78,11 @@ public final class JsEngine implements Disposable
     triggerEvent(this.ptr, eventName, null);
   }
 
+  public void setFileSystem(FileSystem fileSystem)
+  {
+    setFileSystem(this.ptr, fileSystem.ptr);
+  }
+
   public void setDefaultFileSystem(final String basePath)
   {
     setDefaultFileSystem(this.ptr, basePath);
@@ -152,6 +157,8 @@ public final class JsEngine implements Disposable
 
   private final static native void triggerEvent(long ptr, String eventName, long[] args);
 
+  private final static native void setFileSystem(long ptr, long fileSystemPtr);
+
   private final static native void setDefaultFileSystem(long ptr, String basePath);
 
   private final static native void setLogSystem(long ptr, long logSystemPtr);