mako: Specify the socket name for PowerHAL

 * Current code in AOSP points to a new location. The socket name is
   hard coded in MPDecision, so let's compensate for now.
 * We can revert this when Google releases an update that brings it in
   line with Flo.

Change-Id: I893d06a7c6b67c408c2f74ae064a2544c4d495d4