Replace find method with contains method

- The intent behind of this commit is to replace the `find` method
  with the `contains` method.

- `contains` is a new feature of C++20, it will check if there is an
  element with key equivalent to key in the container and return
  true or false.

Tested: built ledManager repo successfully and CI passed.

Signed-off-by: George Liu <liuxiwei@inspur.com>
Change-Id: I09121154983defe051c48e6470a976c5b229a2e7
4 files changed