Add cleanup for all data structures

There are varying degrees of cleanup for each of the data structures here, add explicit cleanup.
- Cleanup queued sessions that are more than a week old.
- Cleanup active sessions that are dead
- Cleanup binder objects whose processes have died.

Test: run new and updated tests
Bug: 346614154
Flag: EXEMPT - bugfix
Change-Id: I2379f932f11d8ec88e30f96fcca6c26fad262fb3
2 files changed