[automerger skipped] Add ramdisk_available to init_first_stage's deps am: 7729c21a47 -s ours

am skip reason: Merged-In I0a9ba90f0ae6f0b551e73d0a4361b8cf5d2c1e85 with SHA-1 3cce62a6b4 is already in history

Original change: https://googleplex-android-review.googlesource.com/c/platform/system/update_engine/+/15067039

Change-Id: Ib43aad1e226d0842c11192e3229101070356027a