libbinder_ndk: AServiceManager_checkService # apex

Feature parity, for faster loading times, etc..

Bug: N/A (requested for use in libnetd_resolv)
Test: ./runtests.sh, noting specifically:
[ RUN      ] NdkBinder.CheckServiceThatDoesntExist
[       OK ] NdkBinder.CheckServiceThatDoesntExist (0 ms)
[ RUN      ] NdkBinder.CheckServiceThatDoesExist
[       OK ] NdkBinder.CheckServiceThatDoesExist (0 ms)

Change-Id: I36b2a7420f5dd374e6b60898a778bbcedb9bd406
diff --git a/libs/binder/ndk/libbinder_ndk.map.txt b/libs/binder/ndk/libbinder_ndk.map.txt
index f0d25f7..655f4d5 100644
--- a/libs/binder/ndk/libbinder_ndk.map.txt
+++ b/libs/binder/ndk/libbinder_ndk.map.txt
@@ -91,6 +91,7 @@
     ABinderProcess_setThreadPoolMaxThreadCount; # apex
     ABinderProcess_startThreadPool; # apex
     AServiceManager_addService; # apex
+    AServiceManager_checkService; # apex
     AServiceManager_getService; # apex
   local:
     *;