AM: Update WaitResult parsing logic in AppLaunch

thisTime is no longer printed out when running am start -W
Remove dependencies with line number when parsing output

Bug: 67683350
Test: atest  google/perf/app-startup/third-party-apps/cold-dropcache-stable-test -v
Test: check applaunch.txt matches test run
Change-Id: Ie39486a1552d1a35c621a4ff67d7043d55a19e10