tree b2b33418021c7782a6167bdba23abc1e58c583d7
parent a93e0f61b14239c58e3168e7d1285819d9047906
author Pete Bentley <prb@google.com> 1544551945 +0000
committer Pete Bentley <prb@google.com> 1544552464 +0000

Add dependency check for tree(1).

Bug: 113373927
Test: Ran tool with and without package installed.
Change-Id: I19dbd18cdac5f652deb84ee996186e0a29886279