Clean up Netd and libnetd_resolv for resolver related commands

1. remove all resolver related commands in netd
2. remove unused API in libnetd_resolv

Bug: 126141549
Test: built, flashed, booted
      system/netd/tests/runtests.sh pass

Change-Id: I35ac8f241eebd6284a6a685ef86cd77a1fce4388
diff --git a/resolv/DnsResolver.cpp b/resolv/DnsResolver.cpp
index 822f860..4b39902 100644
--- a/resolv/DnsResolver.cpp
+++ b/resolv/DnsResolver.cpp
@@ -44,7 +44,7 @@
 
 bool verifyCallbacks() {
     return gResNetdCallbacks.check_calling_permission && gResNetdCallbacks.get_network_context &&
-           gResNetdCallbacks.get_dns64_prefix;
+           gResNetdCallbacks.log;
 }
 
 }  // namespace
diff --git a/resolv/include/netd_resolv/resolv.h b/resolv/include/netd_resolv/resolv.h
index b5518e4..b6348c7 100644
--- a/resolv/include/netd_resolv/resolv.h
+++ b/resolv/include/netd_resolv/resolv.h
@@ -108,47 +108,39 @@
 typedef bool (*check_calling_permission_callback)(const char* permission);
 
 // TODO: Remove the callback after moving NAT64 prefix discovery out of netd to libnetd_resolv.
-typedef bool (*get_dns64_prefix_callback)(unsigned netid, in6_addr* prefix, uint8_t* prefix_len);
+typedef void (*log_callback)(const char* msg);
 
 struct ResolverNetdCallbacks {
     check_calling_permission_callback check_calling_permission;
     get_network_context_callback get_network_context;
-    get_dns64_prefix_callback get_dns64_prefix;
+    log_callback log;
 };
 
-LIBNETD_RESOLV_PUBLIC int android_gethostbyaddrfornetcontext(const void*, socklen_t, int,
-                                                             const android_net_context*, hostent**);
-LIBNETD_RESOLV_PUBLIC int android_gethostbynamefornetcontext(const char*, int,
-                                                             const android_net_context*, hostent**);
-LIBNETD_RESOLV_PUBLIC int android_getaddrinfofornetcontext(const char*, const char*,
-                                                           const addrinfo*,
-                                                           const android_net_context*, addrinfo**);
-
-LIBNETD_RESOLV_PUBLIC bool resolv_has_nameservers(unsigned netid);
-
+int android_gethostbyaddrfornetcontext(const void*, socklen_t, int, const android_net_context*,
+                                       hostent**);
+int android_gethostbynamefornetcontext(const char*, int, const android_net_context*, hostent**);
+int android_getaddrinfofornetcontext(const char*, const char*, const addrinfo*,
+                                     const android_net_context*, addrinfo**);
 // Query dns with raw msg
-LIBNETD_RESOLV_PUBLIC int resolv_res_nsend(const android_net_context* netContext,
-                                           const uint8_t* msg, int msgLen, uint8_t* ans, int ansLen,
-                                           int* rcode, uint32_t flags);
+int resolv_res_nsend(const android_net_context* netContext, const uint8_t* msg, int msgLen,
+                     uint8_t* ans, int ansLen, int* rcode, uint32_t flags);
 
 // Set name servers for a network
-LIBNETD_RESOLV_PUBLIC int resolv_set_nameservers_for_net(unsigned netid, const char** servers,
-                                                         int numservers, const char* domains,
-                                                         const res_params* params);
+int resolv_set_nameservers_for_net(unsigned netid, const char** servers, int numservers,
+                                   const char* domains, const res_params* params);
 
-LIBNETD_RESOLV_PUBLIC int resolv_set_private_dns_for_net(unsigned netid, uint32_t mark,
-                                                         const char** servers, int numServers,
-                                                         const char* tlsName,
-                                                         const uint8_t** fingerprints,
-                                                         int numFingerprints);
+int resolv_set_private_dns_for_net(unsigned netid, uint32_t mark, const char** servers,
+                                   int numServers, const char* tlsName,
+                                   const uint8_t** fingerprints, int numFingerprints);
 
-LIBNETD_RESOLV_PUBLIC void resolv_delete_private_dns_for_net(unsigned netid);
+void resolv_delete_private_dns_for_net(unsigned netid);
 
-LIBNETD_RESOLV_PUBLIC void resolv_get_private_dns_status_for_net(unsigned netid,
-                                                                 ExternalPrivateDnsStatus* status);
+void resolv_get_private_dns_status_for_net(unsigned netid, ExternalPrivateDnsStatus* status);
 
 // Delete the cache associated with a certain network
-LIBNETD_RESOLV_PUBLIC void resolv_delete_cache_for_net(unsigned netid);
+void resolv_delete_cache_for_net(unsigned netid);
+
+LIBNETD_RESOLV_PUBLIC bool resolv_has_nameservers(unsigned netid);
 
 // Set callbacks and bring DnsResolver up.
 LIBNETD_RESOLV_PUBLIC bool resolv_init(const ResolverNetdCallbacks& callbacks);
diff --git a/resolv/include/netd_resolv/resolv_stub.h b/resolv/include/netd_resolv/resolv_stub.h
index 5f78908..41f56fa 100644
--- a/resolv/include/netd_resolv/resolv_stub.h
+++ b/resolv/include/netd_resolv/resolv_stub.h
@@ -34,39 +34,9 @@
 
 // Struct containing function pointers for every function exported by libnetd_resolv.
 extern struct ResolvStub {
-    int (*android_getaddrinfofornetcontext)(const char*, const char*, const addrinfo*,
-                                            const android_net_context*, addrinfo**);
-
-    void (*android_net_res_stats_aggregate)(res_stats* stats, int* successes, int* errors,
-                                            int* timeouts, int* internal_errors, int* rtt_avg,
-                                            time_t* last_sample_time);
-
-    int (*android_net_res_stats_get_info_for_net)(unsigned netid, int* nscount,
-                                                  sockaddr_storage servers[MAXNS], int* dcount,
-                                                  char domains[MAXDNSRCH][MAXDNSRCHPATH],
-                                                  res_params* params, res_stats stats[MAXNS],
-                                                  int* wait_for_pending_req_timeout_count);
-
-    int (*android_net_res_stats_get_usable_servers)(const res_params* params, res_stats stats[],
-                                                    int nscount, bool valid_servers[]);
-
-    void (*resolv_delete_cache_for_net)(unsigned netid);
-
-    void (*resolv_delete_private_dns_for_net)(unsigned netid);
-
-    void (*resolv_get_private_dns_status_for_net)(unsigned netid, ExternalPrivateDnsStatus* status);
-
     bool (*resolv_has_nameservers)(unsigned netid);
 
     bool (*resolv_init)(const ResolverNetdCallbacks& callbacks);
-
-    int (*resolv_set_nameservers_for_net)(unsigned netid, const char** servers, unsigned numservers,
-                                          const char* domains, const res_params* params);
-
-    int (*resolv_set_private_dns_for_net)(unsigned netid, uint32_t mark, const char** servers,
-                                          const unsigned numServers, const char* tlsName,
-                                          const uint8_t** fingerprints,
-                                          const unsigned numFingerprints);
 } RESOLV_STUB;
 
 int resolv_stub_init();
diff --git a/resolv/libnetd_resolv.map.txt b/resolv/libnetd_resolv.map.txt
index bd63ca6..be193db 100644
--- a/resolv/libnetd_resolv.map.txt
+++ b/resolv/libnetd_resolv.map.txt
@@ -20,17 +20,8 @@
 
 LIBNETD_RESOLV {
   global:
-    android_getaddrinfofornetcontext;
-    android_net_res_stats_aggregate;
-    android_net_res_stats_get_info_for_net;
-    android_net_res_stats_get_usable_servers;
-    resolv_delete_cache_for_net;
-    resolv_delete_private_dns_for_net;
-    resolv_get_private_dns_status_for_net;
     resolv_has_nameservers;
     resolv_init;
-    resolv_set_nameservers_for_net;
-    resolv_set_private_dns_for_net;
   local:
     *;
 };