doclava17: Mark access modifier methods as implemented in ProgramElementDocImpl

Current progress is 91/145 methods implemented (62.75%).

Bug: 260694901
Test: ./gradlew doclava17:test
Change-Id: Id4b1e225f8a021992070fc8df04ae8d52990cb4e
diff --git a/doclava17/src/main/java/com/google/doclava/javadoc/ProgramElementDocImpl.java b/doclava17/src/main/java/com/google/doclava/javadoc/ProgramElementDocImpl.java
index 711e0d2..f43b8d1 100644
--- a/doclava17/src/main/java/com/google/doclava/javadoc/ProgramElementDocImpl.java
+++ b/doclava17/src/main/java/com/google/doclava/javadoc/ProgramElementDocImpl.java
@@ -113,37 +113,37 @@
     }
 
     @Override
-    @Used
+    @Used(implemented = true)
     public boolean isPublic() {
         return java.lang.reflect.Modifier.isPublic(reflectModifiers);
     }
 
     @Override
-    @Used
+    @Used(implemented = true)
     public boolean isProtected() {
         return java.lang.reflect.Modifier.isProtected(reflectModifiers);
     }
 
     @Override
-    @Used
+    @Used(implemented = true)
     public boolean isPrivate() {
         return java.lang.reflect.Modifier.isPrivate(reflectModifiers);
     }
 
     @Override
-    @Used
+    @Used(implemented = true)
     public boolean isPackagePrivate() {
         return !(isPublic() || isPrivate() || isProtected());
     }
 
     @Override
-    @Used
+    @Used(implemented = true)
     public boolean isStatic() {
         return java.lang.reflect.Modifier.isStatic(reflectModifiers);
     }
 
     @Override
-    @Used
+    @Used(implemented = true)
     public boolean isFinal() {
         return java.lang.reflect.Modifier.isFinal(reflectModifiers);
     }