Compile stub-annotations.jar and dist-for-goals it.

Test: m -j stub-annotations
Bug: b/78245848
Change-Id: I559d4136a42e424fcaaf4e3d22bb686a37c61df3
diff --git a/Android.bp b/Android.bp
index c58dc68..4ec55f7 100644
--- a/Android.bp
+++ b/Android.bp
@@ -26,3 +26,10 @@
     ],
     manifest: "manifest.txt",
 }
+
+java_library_host {
+    name: "stub-annotations",
+    srcs: [
+        "stub-annotations/src/main/java/**/*.java",
+    ],
+}