Add tetherApplyDnsInterfaces() binder interface.

Bug: 9580643

(cherry picked from commit 212c405c296ed869eda927e683734aff80248872)

Change-Id: I0f636266bbaa8c39847ea1e0ffbfdea789b3de53
diff --git a/server/NetdNativeService.h b/server/NetdNativeService.h
index b5c8f69..c5d9114 100644
--- a/server/NetdNativeService.h
+++ b/server/NetdNativeService.h
@@ -47,6 +47,9 @@
     binder::Status getResolverInfo(int32_t netId, std::vector<std::string>* servers,
             std::vector<std::string>* domains, std::vector<int32_t>* params,
             std::vector<int32_t>* stats) override;
+
+    // Tethering-related commands.
+    binder::Status tetherApplyDnsInterfaces(bool *ret) override;
 };
 
 }  // namespace net