RELAND 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
Merged-In: I0a10bacc11bed974d7393aea1158b06ded286f19
Change-Id: I0a10bacc11bed974d7393aea1158b06ded286f19
3 files changed