Merge "Revert "Always create ramdisk/first_stage_ramdisk."" am: 7173ca82a4 am: c0b3a8b6fb am: 0df2607eba

Original change: https://android-review.googlesource.com/c/platform/system/core/+/1470698

Change-Id: I31f36a2ce28f430c6441bdba2250b07d6a8faceb