trusty: launch_args and `acloud pull` support

- support launch_args
- support retrieving log file with `acloud pull`

Bug: 401710433
Test: acloud-dev create --avd-type trusty
      --trusty-build-id=P81247753 --local-image
      --launch-args "--extra-linux-args trusty-log.log_to_dmesg=always"
Change-Id: Ib10bdc3052df2921c4a88b9c1fedad31d3ff9db0
2 files changed