Add visibility for packages/Connectivity

For modularization of connectivity classes, connectivity classes in
frameworks/base are planned to move to packages/modules/Connectivity.
To facilitate the work, classes are first moved to
frameworks/base/packages/Connectivity, so they can then be moved all
together with their history to packages/modules/Connectivity.

Bug: 171540887
Test: m
Change-Id: I78c7adbfe2242b1d3179d07d3cb1f0ff8a203d65

sdk/Android.bp

@@ -148,6 +148,8 @@ java_defaults {
         ":__subpackages__",
         "//frameworks/base/apex:__subpackages__",
         "//frameworks/base/libs/hwui",
+        // TODO: remove after moving connectivity to packages/modules
+        "//frameworks/base/packages/Connectivity:__subpackages__",
         "//frameworks/base/wifi",
         "//packages/modules:__subpackages__",
         "//packages/providers/MediaProvider:__subpackages__",