ts_srv: HACK to set socket perms

This sets the sockets perms to 0666 so that liblights can send
to it to enable/disable. Without this liblights could not disable
the touchscreen and thus extra drain during sleep. Need to find
a better way to fix this.

Change-Id: Ic14e158be71db96cfc780f48f549382491c2b401
Merge "ts_srv: HACK to set socket perms" into jellybean