Merge "Use freecon() with getcon()/getfilecon()." am: 2acdc9de33 am: ebcf0925fc

Original change: https://android-review.googlesource.com/c/platform/system/core/+/1521162

MUST ONLY BE SUBMITTED BY AUTOMERGER

Change-Id: Iaae3f3c53604eb9fc24a83b49516b75c29490372