Update tint of resource icons of third party QS tiles

Since commit d2274f84
("Fix animations for app QS tiles."), the tint of resource icons of
third party tiles doesn't change when the tile status changes. Keep
track of the tint so that changing the status of the icon will cause
an update of the icon.

BUGBASH-1239

Change-Id: Ib2a91a00b6912ae85f37dd096e62bb6b979e9fc7