Refactor tetherGetStats by using stable aidl structure

Use stable aidl structure instead of persistbundle

Test: runtest frameworks-net passes
Test: manual testing of tetherGetStats function works

Change-Id: I6835541d450446ba7993ac9f5b783d34229b79cb
diff --git a/Android.bp b/Android.bp
index e2b432c..f83bf02 100644
--- a/Android.bp
+++ b/Android.bp
@@ -690,6 +690,7 @@
         "android.hardware.wifi-V1.0-java-constants",
         "android.hardware.radio-V1.0-java",
         "android.hardware.usb.gadget-V1.0-java",
+        "netd_aidl_interface-java",
     ],
 
     // Loaded with System.loadLibrary by android.view.textclassifier