[android] - use US local when converting between int color and RGBA String.

platform/android/MapboxGLAndroidSDK/src/main/java/com/mapbox/mapboxsdk/style/layers/PropertyFactory.java

@@ -8,6 +8,8 @@ import android.support.annotation.ColorInt;
 import com.mapbox.mapboxsdk.style.functions.Function;
 import com.mapbox.mapboxsdk.style.functions.CameraFunction;
 
+import java.util.Locale;
+
 /**
  * Constructs paint/layout properties for Layers
  *
@@ -2352,7 +2354,6 @@ public class PropertyFactory {
   }
 
 
-
   /**
    * If true, icons will display without their corresponding text when the text collides with other symbols and the icon does not.
    *
@@ -2364,9 +2365,9 @@ public class PropertyFactory {
     return new LayoutPropertyValue<>("text-optional", function);
   }
 
-  @SuppressLint("DefaultLocale")
   public static String colorToRgbaString(@ColorInt int value) {
-    return String.format("rgba(%d, %d, %d, %d)", (value >> 16) & 0xFF, (value >> 8) & 0xFF, value & 0xFF, (value >> 24) & 0xFF);
+    return String.format(Locale.US,"rgba(%d, %d, %d, %d)",
+      (value >> 16) & 0xFF, (value >> 8) & 0xFF, value & 0xFF, (value >> 24) & 0xFF);
   }
 
 }