Add the transitive dependencies of boot_image to apex

This avoids having to specify boot libraries in both the boot_image
and separately as java_libs on the apex. Simply add them to the
boot_image (happens automatically ATM when using image_name: "art")
and add the boot_image to the apex.

Bug: 177892522
Test: m nothing
Change-Id: I7e0c41665604b73780cdf0dc555067497b1e6ef0