Fix libnetworkstats_test.

If libraries are moved from the platform to a module, the test
will fail with:

CANNOT LINK EXECUTABLE "/data/local/tmp/libnetworkstats_test/arm64/libnetworkstats_test": library "libnetworkstats.so" not found: needed by main executable

This may be because it can't find libnetworkstats.so because that
is in platform.

In any case, since this is the test for libnetworkstats,
dynamically linking libnetworkstats is incorrect, because it
means if the same CL modifies both libnetworkstats and its test,
that CL will run the modified test against the unmodified
libnetworkstats.so on the device, when running updating tests
without reflashing the device.

Also remove libutils because it does not seem to be needed.

Test: atest libnetworkstats_test passes with libraries moved
Change-Id: Id49641c0a919129e2c54531c3995ec7421161002
diff --git a/service-t/native/libs/libnetworkstats/Android.bp b/service-t/native/libs/libnetworkstats/Android.bp
index bceeefa..d24b14b 100644
--- a/service-t/native/libs/libnetworkstats/Android.bp
+++ b/service-t/native/libs/libnetworkstats/Android.bp
@@ -61,11 +61,12 @@
         "-Wno-unused-parameter",
         "-Wthread-safety",
     ],
-    static_libs: ["libgmock"],
+    static_libs: [
+        "libgmock",
+        "libnetworkstats",
+    ],
     shared_libs: [
         "libbase",
         "liblog",
-        "libnetworkstats",
-        "libutils",
     ],
 }