Fix QS user icon in guest mode

When the profile is updated in guest mode, the user icon in QS footer
is not displayed correctly. To fix this issue, the tinting of
guest icon is applied only when the drawable is not UserIconDrawable.

Fixes: 65148947
Test: manual - switch to guest and update the profile.

Change-Id: I9690e9fd286703a25ee08d877c3dd7f4729e2b31
1 file changed