[android] - add heatmap color property

platform/android/src/style/conversion/property_value.hpp

@@ -2,6 +2,7 @@
 
 #include <mbgl/style/property_value.hpp>
 #include <mbgl/style/data_driven_property_value.hpp>
+#include <mbgl/style/heatmap_color_property_value.hpp>
 #include "../../conversion/conversion.hpp"
 #include "../../conversion/constant.hpp"
 #include "types.hpp"
@@ -70,6 +71,18 @@ struct Converter<jni::jobject*, mbgl::style::DataDrivenPropertyValue<T>> {
     }
 };
 
+/**
+ * Convert core heat map color property value to java
+ */
+template <>
+struct Converter<jni::jobject*, mbgl::style::HeatmapColorPropertyValue> {
+
+    Result<jni::jobject*> operator()(jni::JNIEnv& env, const mbgl::style::HeatmapColorPropertyValue value) const {
+        PropertyValueEvaluator<mbgl::style::HeatmapColorPropertyValue> evaluator(env);
+        return *convert<jni::jobject*>(env, value.evaluate(evaluator));
+    }
+};
+
 } // namespace conversion
 } // namespace android
 } // namespace mbgl