Fix libbinder_sdk build warnings

-Wdeprecated-declarations
-Wformat
-Wpessimizing-move
-Wsign-compare
-Wsubobject-linkage
-Wunused-result
-Wzero-as-null-pointer-constant (turned on in ag/4503295)

Bug: 285204695
Test: m libbinder_sdk
Change-Id: Id4a482c511244968e450fdeecf6b9de41bc65b04
diff --git a/libs/binder/Parcel.cpp b/libs/binder/Parcel.cpp
index 84ef489..77b3275 100644
--- a/libs/binder/Parcel.cpp
+++ b/libs/binder/Parcel.cpp
@@ -2768,7 +2768,7 @@
         }
         if (type == BINDER_TYPE_FD) {
             // FDs from the kernel are always owned
-            FdTag(flat->handle, 0, this);
+            FdTag(flat->handle, nullptr, this);
         }
         minOffset = offset + sizeof(flat_binder_object);
     }