[AA LC] Fix computation of const initializers of fields

compiler/testData/asJava/ultraLightClasses/jvmSynthetic.fir.java

@@ -0,0 +1,10 @@
+public final class A /* A*/ {
+  private int z = 1 /* initializer type: int */;
+
+  public  A();//  .ctor()
+
+  public final int getX();//  getX()
+
+  public final void setX(int);//  setX(int)
+
+}