Deprecate producer/consumer usage: Step 2

Clean up bufferhub_rpc, display_rpc and service side producer/consumer
usage reference.

Next (final) step is to remove all remaining client side reference to
producer/consumer usage and update dvr_xxx API.

This also fixes a minor typo in dvr_named_buffer-test

Bug: 37881101
Test: Build, flash, ran particles.apk and buffer_hub_queue-test
Change-Id: Ibae4376c1fd1ed964843d8b2ad2fb27204fe5e28
diff --git a/libs/vr/libvrflinger/display_service.h b/libs/vr/libvrflinger/display_service.h
index db89064..dd5cac9 100644
--- a/libs/vr/libvrflinger/display_service.h
+++ b/libs/vr/libvrflinger/display_service.h
@@ -40,8 +40,7 @@
   void UpdateActiveDisplaySurfaces();
 
   pdx::Status<BorrowedNativeBufferHandle> SetupNamedBuffer(
-      const std::string& name, size_t size, int producer_usage,
-      int consumer_usage);
+      const std::string& name, size_t size, int usage);
 
   template <class A>
   void ForEachDisplaySurface(A action) const {