Pass other boot classpath locations to the apex image.

In order to evaluate the impact of framework classes being in an image.

Test: m
Bug: 119800099
Exempt-From-Owner-Approval: this is only for an experimental config, which we would like to see
the performance before build snap.
Change-Id: Ib0d3acf8d2718ee443b3bffe8122a54f92257691