Allowlist //external/auto/android-annotation-stubs for bp2build.

Fixes breakage for bp2build-incremental.

Test: b build //external/...
Change-Id: Id493c119b6ba0f383c9d1e8bade8b8a0acf3efe6
diff --git a/android/bazel.go b/android/bazel.go
index 86339ab..342b840 100644
--- a/android/bazel.go
+++ b/android/bazel.go
@@ -293,6 +293,7 @@
 		"development/samples/WiFiDirectDemo":                 Bp2BuildDefaultTrue,
 		"development/sdk":                                    Bp2BuildDefaultTrueRecursively,
 		"external/arm-optimized-routines":                    Bp2BuildDefaultTrueRecursively,
+		"external/auto/android-annotation-stubs":             Bp2BuildDefaultTrueRecursively,
 		"external/auto/common":                               Bp2BuildDefaultTrueRecursively,
 		"external/auto/service":                              Bp2BuildDefaultTrueRecursively,
 		"external/boringssl":                                 Bp2BuildDefaultTrueRecursively,