CCodec: simplify format change logic

Use the reference & dup to track format change.

Bug: 149751672
Test: atest CtsMediaTestCases:AdaptivePlaybackTest
Test: atest CtsMediaTestCases -- --module-arg CtsMediaTestCases:size:small
Change-Id: I73de0e8eb91cdb262945bc7edc46f7ace779b83a
3 files changed