Fix --mode app_process

The boot classpath jars used by vogar for --mode app_process
had fallen out of step with what is actually used on device.

This syncs them up again and updates the instructions on how
to find the correct answer.

Test: Ran vogar --mode app_process successfully
Change-Id: I97bf203b447e8b9d9fe9f3fa601fccdfd0482103