Stop exposing generated AIDL from Tethering

We don't want new modules exposing stable aidl directly. APIs should
be defined as java @SystemApi. It also seems like nothing actually
depend on these interfaces, except one simple exception.

Bug: 147200698
Test: m
Change-Id: Ia4222fa35a9a2f3c75cebb12f75c536f27e2fe16

Tethering/common/TetheringLib/Android.bp

@@ -83,7 +83,6 @@ java_library {
     name: "framework-tethering-stubs",
     srcs: [":framework-tethering-stubs-sources"],
     libs: ["framework-all"],
-    static_libs: ["tethering-aidl-interfaces-java"],
     sdk_version: "core_platform",
 }