Fix `symbol not found` error for hidden apis used by MTS

This fails to build on git_master when
depending on `sdk_version:module-current` and
`libs:["framework-tethering-pre-jarjar"].

AIUI, some builds use sdk prebuilts that have compiled out
some of the hidden apis. And thus fails with symbol not found.

So we depend on the impl version of frame-tethering so we always
have access to these hidden apis for MTS.

Test: atestNetHttpCoverageTests
Change-Id: Id68a9051b9f8566f9ca42142669150a6db8b0925
diff --git a/Cronet/tests/mts/Android.bp b/Cronet/tests/mts/Android.bp
index 0c0d611..adbc384 100644
--- a/Cronet/tests/mts/Android.bp
+++ b/Cronet/tests/mts/Android.bp
@@ -47,7 +47,9 @@
     ],
     libs: [
         "android.test.base",
-        "framework-tethering-pre-jarjar",
+        // Needed for direct access to tethering's hidden apis and to avoid `symbol not found`
+        //  errors on some builds.
+        "framework-tethering.impl",
     ],
     lint: { test: true }
 }
diff --git a/Tethering/common/TetheringLib/Android.bp b/Tethering/common/TetheringLib/Android.bp
index 4f95bdd..74170cb 100644
--- a/Tethering/common/TetheringLib/Android.bp
+++ b/Tethering/common/TetheringLib/Android.bp
@@ -54,6 +54,7 @@
         "//packages/modules/CaptivePortalLogin/tests",
         "//packages/modules/Connectivity/Tethering/tests:__subpackages__",
         "//packages/modules/Connectivity/tests:__subpackages__",
+        "//packages/modules/Connectivity/Cronet/tests:__subpackages__",
         "//packages/modules/IPsec/tests/iketests",
         "//packages/modules/NetworkStack/tests:__subpackages__",
         "//packages/modules/Wifi/service/tests/wifitests",