libbinder: remove per-binder wire protocol version

For the RPC project, I had added a version into the binder-level wire
protocol. However, there is no plan to make the on-device wire protocol
backwards compatible, and for RPC, this version needs to be stored with
RpcSession objects, so it is not needed here.

Bug: 182938972
Test: boot, binderStabilityTest
Change-Id: Iad2e7ae77c562690015814ba8d8d439e1befc0b2
diff --git a/libs/binder/Parcel.cpp b/libs/binder/Parcel.cpp
index ebba375..956524a 100644
--- a/libs/binder/Parcel.cpp
+++ b/libs/binder/Parcel.cpp
@@ -173,7 +173,7 @@
 status_t Parcel::finishFlattenBinder(const sp<IBinder>& binder)
 {
     internal::Stability::tryMarkCompilationUnit(binder.get());
-    int16_t rep = internal::Stability::getCategory(binder.get()).repr();
+    int16_t rep = internal::Stability::getRepr(binder.get());
     return writeInt32(rep);
 }