KT-4418 Converter from java should honor "@Nullable" annotations

#KT-4418 Fixed

j2k/tests/testData/ast/annotations/jetbrainsNullable.java

@@ -0,0 +1,31 @@
+//file
+// !specifyLocalVariableTypeByDefault: true
+package test;
+
+import org.jetbrains.annotations.Nullable;
+
+public class Test {
+  @Nullable String myStr = "String2";
+
+  public Test(@Nullable String str) {
+    myStr = str;
+  }
+
+  public void sout(@Nullable String str) {
+    System.out.println(str);
+  }
+
+  @Nullable
+  public String dummy(@Nullable String str) {
+    return str;
+  }
+
+  public void test() {
+    sout("String");
+    @Nullable String test = "String2";
+    sout(test);
+    sout(dummy(test));
+
+    new Test(test);
+  }
+}