Add audioserver to wakelock group.

Bug: n/a
Test: audioserver is sucessfully able to acquire a wake lock
Change-Id: I150bbf1f56a326580c351726051af51c799ee66f

media/audioserver/audioserver.rc

@@ -2,7 +2,8 @@ service audioserver /system/bin/audioserver
     class main
     user audioserver
     # media gid needed for /dev/fm (radio) and for /data/misc/media (tee)
-    group audio camera drmrpc inet media mediadrm net_bt net_bt_admin net_bw_acct
+    group audio camera drmrpc inet media mediadrm net_bt net_bt_admin net_bw_acct wakelock
+    capabilities BLOCK_SUSPEND
     ioprio rt 4
     writepid /dev/cpuset/foreground/tasks /dev/stune/foreground/tasks
     onrestart restart audio-hal-2-0