Properly calculate isConst for java properties

compiler/testData/codegen/bytecodeTextMultifile/inlineJavaStaticFields/test.kt

@@ -1,6 +1,9 @@
 object KoKobject {
-    @JvmStatic
+    @JvmField
     val JvmStatic: Int = 1
+
+    @JvmField
+    val JvmStaticString: String? = "123"
 }
 
 fun test() {
@@ -20,10 +23,12 @@ fun test() {
 
     JClass.BoxedInt
     JClass.NonFinal
+    JClass.StrNullable
 
     JClass().NonStatic
 
     KoKobject.JvmStatic
+    KoKobject.JvmStaticString
 }
 
 // @TestKt.class:
@@ -42,6 +47,8 @@ fun test() {
 // 1 GETSTATIC JClass.BoxedInt : Ljava/lang/Integer;
 // 1 GETSTATIC JClass.NonFinal : I
 // 1 GETFIELD JClass.NonStatic : I
-// 1 INVOKESTATIC KoKobject.getJvmStatic \(\)I
+// 1 LDC "nullable"
+// 1 GETSTATIC KoKobject.JvmStatic : I
+// 1 GETSTATIC KoKobject.JvmStaticString : Ljava/lang/String
 // 3 POP2
-// 16 POP
+// 18 POP