Merge "Add some warnings and notes about framework's jarjar rules"

Android.bp

@@ -254,9 +254,12 @@ java_library {
     installable: false,
 }
 
+// NOTE: This filegroup is exposed for vendor libraries to depend on and is referenced in
+// documentation. Do not remove without consulting the treble/hidl teams.
 filegroup {
     name: "framework-jarjar-rules",
     srcs: ["framework-jarjar-rules.txt"],
+    visibility: ["//visibility:public"],
 }
 
 java_library {

framework-jarjar-rules.txt

@@ -1,3 +1,7 @@
+# This rule is meant to be reused across libraries in the bootclasspath that depend
+# on the HIDL libraries.
 rule android.hidl.** android.internal.hidl.@1
+
+# Framework-specific renames.
 rule android.net.wifi.WifiAnnotations* android.internal.wifi.WifiAnnotations@1
 rule com.android.server.vcn.util.** com.android.server.vcn.repackaged.util.@1