Merge "Revert^2 "Make default_prop only readable from coredomain"" am: 150355b1c3

Original change: https://android-review.googlesource.com/c/platform/system/sepolicy/+/1549899

MUST ONLY BE SUBMITTED BY AUTOMERGER

Change-Id: Ib7e05b6d68825be1daf5f8accbad7f333766488b