Revert "Always require opt-in for root/system"

This reverts commit 7189310989b4f0c9b42830304203902f2b1d43ba.

Reason for revert: permission failures in a bunch of tests (b/343741096)

Change-Id: Ib863e107e8d9a3c01e484243d2a635323b30deb8
1 file changed