Reland "Track per-process freezable state in BroadcastQueue."

This reverts commit cb5c5714.

Reason for revert: Test failures are addressed, so relanding the cl.

Bug: 287518258
Test: atest ./services/tests/mockingservicestests/src/com/android/server/am/BroadcastQueueModernImplTest.java
Test: atest ./services/tests/mockingservicestests/src/com/android/server/am/BroadcastQueueTest.java
Test: v2/pixel-health-guard/device-boot-health-check-extra using abtd
Change-Id: I5a875c6a99ba3986f54ab99531af5f9a52ba3a8e