Allow ongoing activity chips on dream to receive touch

This change allows the TouchInsetManager to track the ongoing activity
chips view in order for them to receive touches.

Test: atest AmbientStatusBarViewControllerTest
Test: verified touches passed to ongoing activity chips on dream
Fix: 422471181
Flag: com.android.systemui.ongoing_activity_chips_on_dream
Change-Id: I8196856b6839b6fcc7a95610b4d26a3d6a9ff38e