AccessibilityMenuService test class setup & initial test.

Bug: 265173123
Test: atest AccessibilityMenuServiceTests
Change-Id: I388e02b58bf582ae6b481804c5f34883e8692e5f
diff --git a/packages/SystemUI/accessibility/accessibilitymenu/Android.bp b/packages/SystemUI/accessibility/accessibilitymenu/Android.bp
index 140c10d..f358417 100644
--- a/packages/SystemUI/accessibility/accessibilitymenu/Android.bp
+++ b/packages/SystemUI/accessibility/accessibilitymenu/Android.bp
@@ -18,6 +18,15 @@
     default_applicable_licenses: ["Android-Apache-2.0"],
 }
 
+// This filegroup is used by menu tests.
+filegroup {
+    name: "AccessibilityMenuSource",
+    srcs: [
+        "src/**/AccessibilityMenuService.java",
+        "src/**/A11yMenuShortcut.java",
+    ],
+}
+
 android_app {
     name: "AccessibilityMenu",