[android] Added passing user lang as key word in Mopub request

android/jni/CMakeLists.txt

@@ -81,6 +81,7 @@ set(
   com/mapswithme/platform/SocketImpl.cpp
   com/mapswithme/util/Config.cpp
   com/mapswithme/util/HttpClient.cpp
+  com/mapswithme/util/Language.cpp
   com/mapswithme/util/LoggerFactory.cpp
   com/mapswithme/util/NetworkPolicy.cpp
   com/mapswithme/util/StringUtils.cpp

android/jni/com/mapswithme/util/Language.cpp

@@ -0,0 +1,12 @@
+#include "android/jni/com/mapswithme/core/jni_helper.hpp"
+#include "platform/preferred_languages.hpp"
+
+extern "C"
+{
+JNIEXPORT jstring JNICALL
+Java_com_mapswithme_util_Language_nativeNormalize(JNIEnv *env, jclass type, jstring lang)
+{
+  std::string locale = languages::Normalize(jni::ToNativeString(env, lang));
+  return jni::ToJavaString(env, locale);
+}
+}

android/src/com/mapswithme/maps/ads/MopubNativeDownloader.java

@@ -10,6 +10,7 @@ import android.view.View;
 import android.view.ViewGroup;
 
 import com.mapswithme.maps.location.LocationHelper;
+import com.mapswithme.util.Language;
 import com.mapswithme.util.log.Logger;
 import com.mapswithme.util.log.LoggerFactory;
 import com.mopub.nativeads.BaseNativeAd;
@@ -57,11 +58,14 @@ class MopubNativeDownloader extends CachingNativeAdLoader
                    RequestParameters.NativeAdAsset.TEXT,
                    RequestParameters.NativeAdAsset.CALL_TO_ACTION_TEXT,
                    RequestParameters.NativeAdAsset.ICON_IMAGE);
+    requestParameters.desiredAssets(assetsSet);
 
     Location l = LocationHelper.INSTANCE.getSavedLocation();
     if (l != null)
       requestParameters.location(l);
-    requestParameters.desiredAssets(assetsSet);
+
+    String locale = Language.nativeNormalize(Language.getDefaultLocale());
+    requestParameters.keywords("user_lang:" + locale);
 
     nativeAd.makeRequest(requestParameters.build());
   }

android/src/com/mapswithme/util/Language.java

@@ -53,4 +53,7 @@ public class Language
 
     return locale;
   }
+
+  @NonNull
+  public static native String nativeNormalize(@NonNull String locale);
 }