Refactoring OverviewCommandHelper (1/3)

- Updates pendingCommands to be a ConcurrentLinkedDeque and make the list safe across multiple threads.
- Introduces CommandStatus to clear only IDLE and COMPLETED commands.
- Adds CommandType enum to prevent adding an invalid command value into the queue and having an unexpected behavior.
- Log messages improved

Bug: 352046797
Bug: 351122926
Flag: EXEMPT bugfix.
Test: Manual.
Change-Id: I80705dca0be579e62cb9e2bd923808dd33c4d633