[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/include/interface/transport.h

@@ -97,6 +97,7 @@ typedef struct LG_TransportFrameTiming
   uint64_t captureTime;
   uint64_t postProcessTime;
   uint64_t copyTime;
+  uint64_t readyTime;
 }
 LG_TransportFrameTiming;