Add support for polling transport.

To remove remaining direct calls/linkage into libhwbinder.

Bug: 34388964
Test: wifi works
Change-Id: Idd3928e9a0879434cb71ab63eaca905f174e645e
diff --git a/transport/HidlTransportSupport.cpp b/transport/HidlTransportSupport.cpp
index 1df6c38..d0871f6 100644
--- a/transport/HidlTransportSupport.cpp
+++ b/transport/HidlTransportSupport.cpp
@@ -30,6 +30,14 @@
     joinBinderRpcThreadpool();
 }
 
+int setupTransportPolling() {
+    return setupBinderPolling();
+}
+
+status_t handleTransportPoll(int /*fd*/) {
+    return handleBinderPoll();
+}
+
 bool setMinSchedulerPolicy(const sp<::android::hidl::base::V1_0::IBase>& service,
                            int policy, int priority) {
     if (service->isRemote()) {