Consolidate RecentTaskInfo and RunningTaskInfo into TaskInfo class

- Remove overlapping logic for building both recent/running task infos
- Deprecate unused members of recent/running task infos
- Skip creating unnecessary recent task info when creating AppTaskImpl

Bug: 111078814
Test: Build and open Overview (ensure it still works)
Test: atest CtsAppTestCases:ActivityManagerRecentTaskInfoTest
Test: atest CtsAppTestCases:ActivityManagerRunningTaskInfoTest
Change-Id: Iaf1731002196bb89319de141a05ab92a7dcb2928