[host] measure ready time at framebuffer publication

Exclude command queue reset and cleanup from the ready stage, and keep
the wall-clock residual only as the legacy timing fallback.

client/transports/LGMP/lgmp.c

@@ -637,6 +637,7 @@ static void lgmp_getFrameTiming(LG_Transport * this,
   timing->captureTime     = this->pendingFrame->captureTime;
   timing->postProcessTime = this->pendingFrame->postProcessTime;
   timing->copyTime        = this->pendingFrame->copyTime;
+  timing->readyTime       = this->pendingFrame->readyTime;
 }
 
 static void lgmp_releaseFrame(LG_Transport * this, LG_TransportFrame * frame)