Correct visibility to use __pkg__

Test: m nothing
Merged-In: I2dcf7f0f24948422e0ffd4880846313a75d467d2
Change-Id: I2dcf7f0f24948422e0ffd4880846313a75d467d2
diff --git a/apex/Android.bp b/apex/Android.bp
index 74e31cc..29f7d80 100644
--- a/apex/Android.bp
+++ b/apex/Android.bp
@@ -116,7 +116,7 @@
 
     // Hide impl library and stub sources
     impl_library_visibility: [
-        ":__package__",
+        ":__pkg__",
         "//frameworks/base", // For framework-all
     ],
     stubs_source_visibility: ["//visibility:private"],