Extend framework-connectivity.impl visibility

Allow netlegacy22.api to use hidden connectivity methods.

Bug: 182859030
Test: m
Change-Id: I92936afb9fb533ea3b426490eb9617389f99fc8b
diff --git a/framework/Android.bp b/framework/Android.bp
index c62402d..bb93af9 100644
--- a/framework/Android.bp
+++ b/framework/Android.bp
@@ -100,6 +100,7 @@
         "//frameworks/base",
 
         // Tests using hidden APIs
+        "//cts/tests/netlegacy22.api",
         "//external/sl4a:__subpackages__",
         "//frameworks/base/tests/net:__subpackages__",
         "//frameworks/libs/net/common/testutils",