android_paranoid_network: Use in_egroup_p to check gid's.

groups_search is not exported from sys.c which causes problems for module
builds. in_egroup_p is exported and is just what we need.

net/bluetooth/af_bluetooth.c

@@ -141,14 +141,12 @@ static void bt_reclassify_sock_lock(struct socket *sock, int proto)
 #ifdef CONFIG_ANDROID_PARANOID_NETWORK
 static inline int current_has_bt_admin(void)
 {
-	return (!current->euid || current->egid == AID_NET_BT_ADMIN ||
-		groups_search(current->group_info, AID_NET_BT_ADMIN));
+	return (!current->euid || in_egroup_p(AID_NET_BT_ADMIN));
 }
 
 static inline int current_has_bt(void)
 {
-	return (current_has_bt_admin() || current->egid == AID_NET_BT ||
-		groups_search(current->group_info, AID_NET_BT));
+	return (current_has_bt_admin() || in_egroup_p(AID_NET_BT));
 }
 # else
 static inline int current_has_bt_admin(void)

net/ipv4/af_inet.c

@@ -250,16 +250,12 @@ EXPORT_SYMBOL(build_ehash_secret);
 #ifdef CONFIG_ANDROID_PARANOID_NETWORK
 static inline int current_has_network(void)
 {
-	return (!current->euid ||
-		current->egid == AID_INET ||
-		current->egid == AID_NET_RAW ||
-		groups_search(current->group_info, AID_INET) ||
-		groups_search(current->group_info, AID_NET_RAW));
+	return (!current->euid || in_egroup_p(AID_INET) ||
+		in_egroup_p(AID_NET_RAW));
 }
 static inline int current_has_cap(int cap)
 {
-	if (cap == CAP_NET_RAW && (current->egid == AID_NET_RAW ||
-	    groups_search(current->group_info, AID_NET_RAW)))
+	if (cap == CAP_NET_RAW && in_egroup_p(AID_NET_RAW))
 		return 1;
 	return capable(cap);
 }

net/ipv6/af_inet6.c

@@ -86,8 +86,7 @@ static __inline__ struct ipv6_pinfo *inet6_sk_generic(struct sock *sk)
 #ifdef CONFIG_ANDROID_PARANOID_NETWORK
 static inline int current_has_network(void)
 {
-	return (!current->uid || current->gid == AID_INET ||
-		groups_search(current->group_info, AID_INET));
+	return (!current->euid || in_egroup_p(AID_INET));
 }
 # else
 static inline int current_has_network(void)