libutils: split out libutils_binder

Dependencies of libbinder, so we can build
a core libbinder library, libbinder_sdk.

This is preparing the way to move this part of libbinder
together with binder code into a single project.

Bug: 302720583
Change-Id: Icff078ac6e36c7f2b91cf815d5b9ed19b2e706e1
diff --git a/libutils/TEST_MAPPING b/libutils/TEST_MAPPING
index c8ef45c..472146f 100644
--- a/libutils/TEST_MAPPING
+++ b/libutils/TEST_MAPPING
@@ -2,6 +2,9 @@
   "presubmit": [
     {
       "name": "libutils_test"
+    },
+    {
+      "name": "libutils_binder_test"
     }
   ]
 }