Send topology updates to frozen processes

Use the same approach as display events - create an activity, cache/freeze it, then send topology updates and wake up the activity.

Extract common code to the TestBase class.

Don't send a null topology graph to Input Manager.

Bug: 379093437
Bug: 399182507
Flag: com.android.server.display.feature.flags.display_topology
Test: DisplayManagerServiceTest, DisplayEventDeliveryTest, TopologyUpdateDeliveryTest
Change-Id: Ib931de4d712ac22843fcc0b9d7565fb92f94791b