Internal Updates. (firebase#1422)

* Add logic to trim webp parameter from native image urls

Author: nakirekommula

gma/src/android/native_ad_image_android.cc

@@ -71,6 +71,15 @@ NativeAdImage::NativeAdImage(
   FIREBASE_ASSERT(j_uri);
   internal_->uri = util::JniUriToString(env, j_uri);
 
+  // Images requested with an android user agent may return webp images. Trim
+  // webp parameter from image url to get the original JPG/PNG image.
+  std::size_t eq_pos = internal_->uri.rfind("=");
+  std::size_t webp_pos = internal_->uri.rfind("-rw");
+  if (webp_pos != std::string::npos && eq_pos != std::string::npos &&
+      webp_pos > eq_pos) {
+    internal_->uri.replace(webp_pos, 3, "");
+  }
+
   // NativeAdImage scale.
   jdouble j_scale =
       env->CallDoubleMethod(internal_->native_ad_image,