Allow hostapd to open UDP sockets

Some Android kernels have an extra patch to disallow calls like

socket(PF_INET, SOCK_DGRAM, 0)

unless the calling process is in one of a few special supplementary
groups that have been specially whitelisted for priviledged network
related operations.  See the discussion at:

http://elinux.org/Android_Security#Paranoid_network-ing

Bug: None
Test: wificond integration tests pass on aosp/master again now that
      hostapd can be started as a service again.

Change-Id: I45981873cb1728154ade4357ef5576228ca716d1
diff --git a/hostapd/hostapd.android.rc b/hostapd/hostapd.android.rc
index 83e8d87..eee4b53 100644
--- a/hostapd/hostapd.android.rc
+++ b/hostapd/hostapd.android.rc
@@ -14,7 +14,7 @@
         /data/misc/wifi/hostapd.conf
     class main
     user wifi
+    group wifi net_raw
     writepid /data/misc/wifi/hostapd.pid
-    group wifi
     disabled
     oneshot