Make libfs_mgr dependencies vendor_ramdisk_available. am: 61bc5a70 am:...

Make libfs_mgr dependencies vendor_ramdisk_available. am: 61bc5a70 am: 0e6b62dc am: da456de9 am: ad68a33a

Original change: https://android-review.googlesource.com/c/platform/system/core/+/1777151

Change-Id: Ic8558c6ad1be12c289b6348a1f852622ede2faf4