Use scudo_ring_buffer_size from process_info

This is a no-op but will be used in upcoming scudo changes that allow to
change the buffer size at process startup time, and as such we will no
longer be able to call __scudo_get_ring_buffer_size in debuggerd.

Bug: 263287052
Change-Id: I350421d1fcdf22ce3b8b73780b88c1e10fa8a074
diff --git a/debuggerd/protocol.h b/debuggerd/protocol.h
index f33b2f0..e7cb218 100644
--- a/debuggerd/protocol.h
+++ b/debuggerd/protocol.h
@@ -98,6 +98,7 @@
   uintptr_t scudo_stack_depot;
   uintptr_t scudo_region_info;
   uintptr_t scudo_ring_buffer;
+  size_t scudo_ring_buffer_size;
 };
 
 struct __attribute__((__packed__)) CrashInfo {