Merge "Revert "Add ramdisk_available to init_first_stage's deps"" into sc-dev am: 04206a96c8

Original change: https://googleplex-android-review.googlesource.com/c/platform/system/update_engine/+/15167755

Change-Id: I945e618f872acaa6b0c57efa1ba3942c6cc04187