Update some more logs

- Add WCT activity starts under the existing start-activity debug prop
- And add a prop for debugging where shell transitions are requested as
  well
- Update the transitions dump to list handlers in dispatch order
- Add a transition log for which handle handles a request

Bug: 378565144
Flag: EXEMPT adding logs
Test: adb shell setprop persist.wm.debug.start_shell_transition true
      adb logcat -s "ShellTransitions"
Change-Id: I255922f87cf526687f1b639fa8a8b7cc13dc0c78