tree 7d51b7bb3e84036fe00e85d8ca7644939a9f61d2
parent 77a31917f2817d3f147dc6e727f52d537e11fe4d
author dianlujitao <dianlujitao@lineageos.org> 1579187036 +0800
committer bigbiff <bigbiff@teamw.in> 1589139833 -0400

Properly detect system-as-root

ANDROID_ROOT environment variable is also used by other Android
components thus it should ALWAYS be /system in order not to break other
tools. On the other hand, AOSP does have a system property to indicate
system-as-root, just make use of it.

Change-Id: I7fc58a78db7abd05fac9000910169c370f5de62d