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
diff --git a/media/codec2/sfplugin/CCodec.cpp b/media/codec2/sfplugin/CCodec.cpp
index 1405b97..0036bef 100644
--- a/media/codec2/sfplugin/CCodec.cpp
+++ b/media/codec2/sfplugin/CCodec.cpp
@@ -1794,7 +1794,6 @@
             // handle configuration changes in work done
             Mutexed<std::unique_ptr<Config>>::Locked configLocked(mConfig);
             const std::unique_ptr<Config> &config = *configLocked;
-            bool changed = false;
             Config::Watcher<C2StreamInitDataInfo::output> initData =
                 config->watch<C2StreamInitDataInfo::output>();
             if (!work->worklets.empty()
@@ -1829,9 +1828,7 @@
                     ++stream;
                 }
 
-                if (config->updateConfiguration(updates, config->mOutputDomain)) {
-                    changed = true;
-                }
+                config->updateConfiguration(updates, config->mOutputDomain);
 
                 // copy standard infos to graphic buffers if not already present (otherwise, we
                 // may overwrite the actual intermediate value with a final value)
@@ -1865,7 +1862,7 @@
                 config->mInputSurface->onInputBufferDone(work->input.ordinal.frameIndex);
             }
             mChannel->onWorkDone(
-                    std::move(work), changed ? config->mOutputFormat->dup() : nullptr,
+                    std::move(work), config->mOutputFormat,
                     initData.hasChanged() ? initData.update().get() : nullptr);
             break;
         }