libhidltransport: move methods to sources

Moved all methods with no templatization into sources.

Test: links
Bug: 35710429
Change-Id: I44bd6407e1bd74dd188b4033ddf176587ccdd8e7
diff --git a/transport/include/hidl/HidlBinderSupport.h b/transport/include/hidl/HidlBinderSupport.h
index a82f977..6f82dbc 100644
--- a/transport/include/hidl/HidlBinderSupport.h
+++ b/transport/include/hidl/HidlBinderSupport.h
@@ -40,18 +40,9 @@
 // DeathRecipient interface.
 struct hidl_binder_death_recipient : IBinder::DeathRecipient {
     hidl_binder_death_recipient(const sp<hidl_death_recipient> &recipient,
-            uint64_t cookie, const sp<::android::hidl::base::V1_0::IBase> &base) :
-        mRecipient(recipient), mCookie(cookie), mBase(base) {
-    }
-    virtual void binderDied(const wp<IBinder>& /*who*/) {
-        sp<hidl_death_recipient> recipient = mRecipient.promote();
-        if (recipient != nullptr) {
-            recipient->serviceDied(mCookie, mBase);
-        }
-    }
-    wp<hidl_death_recipient> getRecipient() {
-        return mRecipient;
-    }
+            uint64_t cookie, const sp<::android::hidl::base::V1_0::IBase> &base);
+    virtual void binderDied(const wp<IBinder>& /*who*/);
+    wp<hidl_death_recipient> getRecipient();
 private:
     wp<hidl_death_recipient> mRecipient;
     uint64_t mCookie;