Add treble_labeling_violators

It doesn't make sense to enforce debuggable-only apps. This adds a new
violator attribute that can be used only on debuggable builds.

Also the attribute is available only for 202604 or later, so treble
labeling tests won't run by default until 202604.

Bug: 421803639
Test: manual
Change-Id: I2d80e2b51c68271ba7bbfdb144d404a67fe03b14