Compile android-non-updatable with framework-tethering module-lib stub

To resolve framework-tethering's module-lib for android-non-updatable
API, compile android-non-updatable with
sdk_module-lib_current_framework-tethering.

Bug: 205658040
Test: make update-api && make

Change-Id: Ib4bd0312f6c621ba19552a2608e47f9158b0fe25
diff --git a/Android.bp b/Android.bp
index 00b4198..8e851db 100644
--- a/Android.bp
+++ b/Android.bp
@@ -566,6 +566,7 @@
         "android.hardware.vibrator-V1.3-java",
         "framework-protos",
         "art.module.public.api",
+        "sdk_module-lib_current_framework-tethering",
         // There are a few classes from modules used by the core that
         // need to be resolved by metalava. We use a prebuilt stub of the
         // full sdk to ensure we can resolve them. If a new class gets added,