[java, java-decompiler] type annotations in class files

Step 1: add top-level field/method/parameter annotations to stubs; include them in decompiled text.

testData/src/pkg/TypeAnnotations.java

@@ -0,0 +1,22 @@
+package pkg;
+
+import java.lang.annotation.*;
+import java.util.*;
+
+class TypeAnnotations {
+  @Target(ElementType.TYPE_USE)
+  @interface TA { String value(); }
+
+  @Target({ElementType.FIELD, ElementType.TYPE_USE})
+  @interface MixA { String value(); }
+
+  private @TA("field type") String f1;
+
+  private @MixA("field and type") String f2;
+
+  @TA("return type") int m1() {
+    return 42;
+  }
+
+  void m2(@TA("parameter") int i) { }
+}