Updated UserIconDrawable#shouldUpdateColorFilter to return true if

current ColorFilter was not an instance of PorterDuffColorFilter

Fixed issue where UserIcondrawable#shouldUpdateColorFilter would
mistakenly return false if the current ColorFilter was not a
PorterDuffColor filter leading to color tints to not be applied if no
ColorFilter was applied previously.

Change-Id: I463932403723b2542cb79e4d996b5ffdc4c32f98
Fixes: 77907724
Test: Re-ran atest on UserIcondrawable