[SB][Chips] Update notif icon color in chip whenever theme changes.

The Chip Composable will be re-composed when the theme changes, we just
need to re-calculate the icon color and re-set the value on the
StatusBarIconView when that happens.

Fixes: 397500380
Bug: 372657935
Flag: com.android.systemui.status_bar_chips_modernization
Test: Trigger notification chip then change theme -> verify icon color
also changes
Test: Trigger call chip then change theme -> verify icon color also
changes
Test: Trigger screen record chip then change theme -> verify icon &
background colors stay the same

Change-Id: I3f75a95b9d086fbd79a0c59df2eabb436b659afc