Allow creation of heaps that are read-only to partner

Change-Id: I3c2b3d9b1671da4b9d9c58dce27e291d30703b03
diff --git a/include/binder/MemoryDealer.h b/include/binder/MemoryDealer.h
index 170f20d..aa415d5 100644
--- a/include/binder/MemoryDealer.h
+++ b/include/binder/MemoryDealer.h
@@ -34,7 +34,8 @@
 class MemoryDealer : public RefBase
 {
 public:
-    MemoryDealer(size_t size, const char* name = 0);
+    MemoryDealer(size_t size, const char* name = 0,
+            uint32_t flags = 0 /* or bits such as MemoryHeapBase::READ_ONLY */ );
 
     virtual sp<IMemory> allocate(size_t size);
     virtual void        deallocate(size_t offset);