Add libstatspull and libstatssocket to the apex

Also make libstatssocket dependency static in statsd_test temporarily to use
AStatsEvent_getBuffer in tests.

Bug: 145922701
Bug: 145923416
Test: m

Change-Id: Idb8107cfe4f7d08d08c7a242c037fcc63912bb5f
diff --git a/apex/Android.bp b/apex/Android.bp
index 0e93110..86a3a7d 100644
--- a/apex/Android.bp
+++ b/apex/Android.bp
@@ -21,6 +21,8 @@
 apex_defaults {
     native_shared_libs: [
         "libstats_jni",
+        "libstatspull",
+        "libstatssocket",
     ],
     // binaries: ["vold"],
     java_libs: [