Merge "Use freecon() with getcon()/getfilecon()." am: 2acdc9de33 am: ebcf0925fc am: 93f97df267

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

MUST ONLY BE SUBMITTED BY AUTOMERGER

Change-Id: Iebfeabe61b9d45c7bb607e7006d728e23351363a