Add temporary bbq merge path to SCR logs

- Until we get some native-side logs, at least surface these to SCR so
  we don't lose them when trying to trace locally

Flag: EXEMPT dev logging
Bug: 349601805
Bug: 366484871
Test: adb shell setprop persist.wm.debug.sc.tx.log_match_call setAlpha,merge,apply
Change-Id: I9a3860f894f3649d1a7942a9cc43f6e693610a5a