Get filesystemInfo from Super_image dep

https://r.android.com/3447508 added super_img to the deps of the
autogenerated android_device module, and also removed the individual
partitions from the direct deps. This CL updates the target_files.zip
generation logic to get the FilesystemInfo(s) from the super_image
dependency

This CL also contains an additional fix for
https://r.android.com/3446350 (bootimg).
bootimg currently sets both BootimgInfoProvider as well FilesystemInfoProvider
(for its ramdisk). Checking bootimgProvider first ensures that the
boot.img file is copied, and not its ramdisk.img

Test: Diff'd locally
Bug: 388635097

Change-Id: I654c8eb72ed7b19a955170db1a12a737fbaa8079