Fix rounded corners modifying already rounded corners

Rounded corners should noop for corners that already have control points
diff --git a/lottie/src/main/java/com/airbnb/lottie/animation/content/RoundedCornersContent.java b/lottie/src/main/java/com/airbnb/lottie/animation/content/RoundedCornersContent.java
index 06a3bb1..30db45c 100644
--- a/lottie/src/main/java/com/airbnb/lottie/animation/content/RoundedCornersContent.java
+++ b/lottie/src/main/java/com/airbnb/lottie/animation/content/RoundedCornersContent.java
@@ -161,9 +161,9 @@
         // oriented point to CubicCurveData (path segments).
         CubicCurveData previousCurveData = modifiedCurves.get(floorMod(modifiedCurvesIndex - 1, modifiedCurves.size()));
         CubicCurveData currentCurveData = modifiedCurves.get(modifiedCurvesIndex);
-        previousCurveData.setControlPoint2(previousCurve.getVertex().x, previousCurve.getVertex().y);
+        previousCurveData.setControlPoint2(previousCurve.getControlPoint2().x, previousCurve.getControlPoint2().y);
         previousCurveData.setVertex(previousCurve.getVertex().x, previousCurve.getVertex().y);
-        currentCurveData.setControlPoint1(startingCurve.getVertex().x, startingCurve.getVertex().y);
+        currentCurveData.setControlPoint1(startingCurve.getControlPoint1().x, startingCurve.getControlPoint1().y);
         modifiedCurvesIndex++;
       }
     }
diff --git a/snapshot-tests/src/main/assets/Tests/RoundedWithAlreadyRoundedCorners.json b/snapshot-tests/src/main/assets/Tests/RoundedWithAlreadyRoundedCorners.json
new file mode 100644
index 0000000..46dfd07
--- /dev/null
+++ b/snapshot-tests/src/main/assets/Tests/RoundedWithAlreadyRoundedCorners.json
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\ No newline at end of file