Expose Connectivity libraries to VCN and tests

This patch exposes Connectivity libraries to allow migrating VCN to
its own non-updatable framework and service libraries. It also
creates a utility library for VCN.

Bug: 369703242
Test: atest FrameworksVcnTests && atest CtsVcnTestCases
Flag: EXEMPT no functional change
Change-Id: I1981f1cc824dcf426a76a0af8e4e3460fccb754e
diff --git a/tests/common/Android.bp b/tests/common/Android.bp
index bb1009b..60a02fb 100644
--- a/tests/common/Android.bp
+++ b/tests/common/Android.bp
@@ -147,6 +147,7 @@
         // meaning @hide APIs in framework-connectivity are resolved before @SystemApi
         // stubs in framework
         "framework-connectivity.impl",
+        "framework-connectivity-b.impl",
         "framework-connectivity-t.impl",
         "framework-tethering.impl",
         "framework",