Add NDK API for getprocdns,setprocdns

The API allows callers to control the default network that is used for
DNS hostname resolution.

Test: atest CtsNetTestCases
      Tests in change I00143cafcd3eb1d71e8d5c7ea9c839a99dc6f4ce
Bug: 171540887
Merged-In: I42f0d9b17b3058f6e10fd2e651278b290f26667f
Change-Id: Id6c40145b8886a7ec6f2bd3a25ad85e8df32f4bb
diff --git a/native/android/libandroid_net.map.txt b/native/android/libandroid_net.map.txt
index cc8dd72..a6c1b50 100644
--- a/native/android/libandroid_net.map.txt
+++ b/native/android/libandroid_net.map.txt
@@ -16,6 +16,8 @@
     android_res_nsend; # llndk
     # These functions have been part of the NDK since API 31.
     android_getprocnetwork; # llndk
+    android_setprocdns; # llndk
+    android_getprocdns; # llndk
   local:
     *;
 };