Revert "Revert "Set USER_FIXED for all non-granted permissions as long as one...

Revert "Revert "Set USER_FIXED for all non-granted permissions as long as one in the group is changed.""

This reverts commit 9385a5c7.

275897a5 broke the master build.  It was
reverted with 9385a5c7 but it turns out
that ArrayUtils.appendString was already implemented in master.  Reverting
this upstream change caused the implementation in master to disappear,
breaking the build further.  This CL restores master to where it was before
275897a5 merged downwards.

Change-Id: I1440d21fb3bf9a2cf9dda044b3f7d95cb0ba2b14