android: add `avd.py start` subcommand.

Bug: 922145
Change-Id: I4403bd2a500297bb1c1166dc87900e065f10a060
Reviewed-on: https://chromium-review.googlesource.com/c/chromium/src/+/1913970
Auto-Submit: John Budorick <jbudorick@chromium.org>
Reviewed-by: Yun Liu <yliuyliu@google.com>
Commit-Queue: John Budorick <jbudorick@chromium.org>
Cr-Original-Commit-Position: refs/heads/master@{#715071}
Cr-Mirrored-From: https://chromium.googlesource.com/chromium/src
Cr-Mirrored-Commit: bcf164cac37e6d7b8338c3f5e1d6637466089ab1
1 file changed