Change to device-tests

In cf, signing key has been changed to dev key. So LibStatsPullTests
tests is changed to device-tests.

Change-Id: I5971ae584afeebccc0ba3ed55e6579858666db79
Bug: 153482272
Test: m -j
1 file changed
tree: 510a0547aeefaef6667311ae5290ef09430ceb89
  1. apex/