Add framework-statsd dependency and make framework-statsd visible to
Tethering package.

Tethering needs StatsEvent and StatsLog which are in
framework-statsd.stubs.module_lib to write metrics.

Bug: 153942334

Test: make
Change-Id: I8ba142a9b3678de36e6c4880a64e992e00680f38
diff --git a/Tethering/Android.bp b/Tethering/Android.bp
index 32e2b04..12daa61 100644
--- a/Tethering/Android.bp
+++ b/Tethering/Android.bp
@@ -33,6 +33,7 @@
         "net-utils-framework-common",
     ],
     libs: [
+        "framework-statsd.stubs.module_lib",
         "framework-tethering.impl",
         "framework-wifi",
         "unsupportedappusage",