Add NetworkStack to framework-connetivity and framework-tethering impl lib visibility

As NetworkStackApi*Shims modules defined in
packages/modules/NetworkStack depends on the impl libs of
framework-connectivity and framework-tethering

Test: m nothing
Bug: 358613520
Change-Id: I5c90d4ae6eeb51f42f1ae1c88dd726bfdcd093e8
diff --git a/Tethering/common/TetheringLib/Android.bp b/Tethering/common/TetheringLib/Android.bp
index 6e00756..808525f 100644
--- a/Tethering/common/TetheringLib/Android.bp
+++ b/Tethering/common/TetheringLib/Android.bp
@@ -46,6 +46,7 @@
         "//packages/modules/Connectivity/tests:__subpackages__",
         "//packages/modules/Connectivity/thread/tests:__subpackages__",
         "//packages/modules/IPsec/tests/iketests",
+        "//packages/modules/NetworkStack",
         "//packages/modules/NetworkStack/tests:__subpackages__",
         "//packages/modules/Wifi/service/tests/wifitests",
     ],