Simplify pushing directories to android devices

Change-Id: I5f0ce6720be821ae3825b58afc94dbeb2f50e2d8
Reviewed-on: https://skia-review.googlesource.com/c/skia/+/372217
Reviewed-by: Mike Klein <mtklein@google.com>
Commit-Queue: Mike Klein <mtklein@google.com>
28 files changed