Add ramdisk_node_list

This file contains a description of dev nodes added to the CPIO archive
for the Android ramdisks. /dev/null is a security requirement for
bionic, /dev/console is needed so the kernel can set-up stdout stderr
and stdin before running /init.

Bug: 254835242
Change-Id: I111e2db53fabd63d070b8e9ab9c52faebf484ab3