Revert^2 "Deprecate android.hidl.allocator after U vintf"

37904d99c75225447bd1aeb6dcf14968cbe030ed

Change-Id: Id09421ac669fab7c20682b6b01d7b73596fac846
diff --git a/transport/allocator/1.0/default/android.hidl.allocator@1.0-service.xml b/transport/allocator/1.0/default/android.hidl.allocator@1.0-service.xml
index 5218241..6fa909b 100644
--- a/transport/allocator/1.0/default/android.hidl.allocator@1.0-service.xml
+++ b/transport/allocator/1.0/default/android.hidl.allocator@1.0-service.xml
@@ -1,5 +1,5 @@
 <manifest version="1.0" type="framework">
-    <hal>
+    <hal max-level="8">
         <name>android.hidl.allocator</name>
         <transport>hwbinder</transport>
         <version>1.0</version>