Allow debugging only for apps forked from zygote

When starting the runtime from app_process, we only pass JDWP options
if starting zygote. It prevents from opening a JDWP connection in
non-zygote programs while Android apps (forked from zygote) remain
debuggable.

Bug: 23050463
Change-Id: If8ea719063a65db4cdeed69a838b52e87b078b08
3 files changed