Resolve device selector on detach and add YuvStimProducer state tests.

Detach finds the shared producer via lcameraDev_resolveDeviceSelectorCReq
then removes buffers by attach identity; unit tests cover quale guards.

Co-authored-by: Cursor <cursoragent@cursor.com>

stimBuffApis/lcameraBuff/tests/CMakeLists.txt

@@ -2,6 +2,8 @@ add_executable(lcameraBuff_unit_tests
 	lcameraBuffParams_tests.cpp
 	pixelAndColorFormatDecisions_tests.cpp
 	yuvLayoutClassification_tests.cpp
+	yuvStimProducer_state_tests.cpp
+	hilSmoCallbacksStub.cpp
 )
 
 target_include_directories(lcameraBuff_unit_tests PRIVATE