Add test config to libstatspull_test and libstatssocket_test

and apply mainline module test controller to it so that

the tests will only be run when statsd apex is found on device.

Bug: 154845935
Test: m mts && mts-tradefed run mts-statsd
Change-Id: I8939e68b4d4c3772e248c1960b74c0f1bd6a21a6

lib/libstatspull/Android.bp

diff --git a/lib/libstatspull/Android.bp b/lib/libstatspull/Android.bp
index 2658639..a8b4a4f 100644
--- a/lib/libstatspull/Android.bp
+++ b/lib/libstatspull/Android.bp
@@ -85,13 +85,18 @@
         "libstatssocket",
     ],
     test_suites: ["general-tests", "mts"],
+    test_config: "libstatspull_test.xml",
+
     //TODO(b/153588990): Remove when the build system properly separates 
     //32bit and 64bit architectures.
     compile_multilib: "both",
     multilib: {
         lib64: {
             suffix: "64",
-        }
+        },
+        lib32: {
+            suffix: "32",
+        },
     },
     cflags: [
         "-Wall",