[issue #788] Add more nullity annotations where relevant

(chainable setters, static constructors, builder stuff)

test/transform/resource/before/StaticConstructor.java

@@ -0,0 +1,6 @@
+//CONF: lombok.addNullAnnotations = checkerframework
+import lombok.AllArgsConstructor;
+@AllArgsConstructor(staticName = "of")
+public class StaticConstructor {
+	String name;
+}