Add rudimentary apple-related classes to fakebuildapi.

These fakes won't behave at all like real implementations at this time. In fact, invoking some of their methods (or accessing their fields) may result in an error. This serves, however, as the initial check-in which can be iterated on and improved later.

RELNOTES: None.
PiperOrigin-RevId: 202525168
diff --git a/src/main/java/com/google/devtools/build/skydoc/BUILD b/src/main/java/com/google/devtools/build/skydoc/BUILD
index d3bcf4b..b80bfab 100644
--- a/src/main/java/com/google/devtools/build/skydoc/BUILD
+++ b/src/main/java/com/google/devtools/build/skydoc/BUILD
@@ -16,6 +16,7 @@
     name = "srcs",
     srcs = glob(["**"]) + [
         "//src/main/java/com/google/devtools/build/skydoc/fakebuildapi:srcs",
+        "//src/main/java/com/google/devtools/build/skydoc/fakebuildapi/apple:srcs",
         "//src/main/java/com/google/devtools/build/skydoc/rendering:srcs",
     ],
 )
@@ -35,8 +36,10 @@
         "//src/main/java/com/google/devtools/build/lib:events",
         "//src/main/java/com/google/devtools/build/lib:syntax",
         "//src/main/java/com/google/devtools/build/lib/skylarkbuildapi",
+        "//src/main/java/com/google/devtools/build/lib/skylarkbuildapi/apple",
         "//src/main/java/com/google/devtools/build/lib/vfs:pathfragment",
         "//src/main/java/com/google/devtools/build/skydoc/fakebuildapi",
+        "//src/main/java/com/google/devtools/build/skydoc/fakebuildapi/apple",
         "//src/main/java/com/google/devtools/build/skydoc/rendering",
         "//third_party:guava",
         "//third_party:jsr305",