Add OngoingActivityChips composables to the status bar

This CL adds composable OngoingActivityChips to the status bar.
A composable view is added before the notification_icon_area
to match the existing ordering in the status bar.

Test: Make sure chips UI matches existing Android View chips.
Screenshot provided in b/372657935 comment#15
Bug: b/372657935
Flag: com.android.systemui.status_bar_chips_modernization

Change-Id: I611640cfd775c0e839e4b484e0bd0317b1f0a72f