New J2K: add some tests from obsolete issues

nj2k/testData/newJ2k/issues/kt-19600.java

@@ -0,0 +1,15 @@
+public class TestNumberConversionInSetter {
+    private double d;
+
+    public void init() {
+        setD(1);
+    }
+
+    public double getD() {
+        return d;
+    }
+
+    public void setD(double d) {
+        this.d = d;
+    }
+}