Disable SDK_TOOLS on the release branch

BUG=None
TEST=cros_mark_android_as_stable_unittest

Change-Id: I2636f95f3cc9e994218b5804617e34e864038364
Reviewed-on: https://chromium-review.googlesource.com/379155
Reviewed-by: Bernie Thompson <bhthompson@chromium.org>
Commit-Queue: Bernie Thompson <bhthompson@chromium.org>
Tested-by: Bernie Thompson <bhthompson@chromium.org>
2 files changed