Rename Build.IS_CONTAINER to IS_ARC

As ARC is moving from a container to a VM based solution, change the
build method to detect this.

Bug: 139490365
Test: Check that VM works after pushing to device: run play store,
install app.

Change-Id: Ic91a7e5c9a36242d2c905cecffeec72acba8ff45
(cherry picked from commit 2f78de6d0e1428d959f97ea0dd0e3c9c28b6e3fb)