Add kotlin-annotations to WindowManager-Shell

Soong normally adds kotlin-annotations as a dependency to any module
that uses kotlin sources, but it can't find the kotlin sources in
WindowManager-Shell because they are all in a filegroup.  Add it
manually as a workaround.

Bug: 225013372
Test: m checkbuild
Change-Id: I3b61702b13ae72d4cb20620dfbf9707f4b8aaaaa

libs/WindowManager/Shell/Android.bp

@@ -138,6 +138,11 @@ android_library {
         "dagger2",
         "jsr330",
     ],
+    libs: [
+        // Soong fails to automatically add this dependency because all the
+        // *.kt sources are inside a filegroup.
+        "kotlin-annotations",
+    ],
     kotlincflags: ["-Xjvm-default=enable"],
     manifest: "AndroidManifest.xml",
     plugins: ["dagger2-compiler"],