Test Layer 0 on Ubuntu 14 and 16
Test Layer 0 on Ubuntu 14 and 16

This extends the coverage of the test to the three platforms we list in
the documentation.

This caught b/126713218.

Change-Id: I81e67b4c9706fa22f3707bdd9991536440d3a70a
GitOrigin-RevId: 6186e938c91e7f224c60a734b335dd106fff7c1b

googlecloudrobotics/core,googlecloudrobotics/core,googlecloudrobotics/core