MLECO-3183: Refactoring application sources

Platform agnostic application sources are moved into application
api module with their own independent CMake projects.

Changes for MLECO-3080 also included - they create CMake projects
individial API's (again, platform agnostic) that dependent on the
common logic. The API for KWS_API "joint" API has been removed and
now the use case relies on individual KWS, and ASR API libraries.

Change-Id: I1f7748dc767abb3904634a04e0991b74ac7b756d
Signed-off-by: Kshitij Sisodia <kshitij.sisodia@arm.com>
diff --git a/source/use_case/kws_asr/src/UseCaseHandler.cc b/source/use_case/kws_asr/src/UseCaseHandler.cc
index 01aefae..9427ae0 100644
--- a/source/use_case/kws_asr/src/UseCaseHandler.cc
+++ b/source/use_case/kws_asr/src/UseCaseHandler.cc
@@ -25,6 +25,7 @@
 #include "MicroNetKwsMfcc.hpp"
 #include "Classifier.hpp"
 #include "KwsResult.hpp"
+#include "Wav2LetterModel.hpp"
 #include "Wav2LetterMfcc.hpp"
 #include "Wav2LetterPreprocess.hpp"
 #include "Wav2LetterPostprocess.hpp"
@@ -470,4 +471,4 @@
     }
 
 } /* namespace app */
-} /* namespace arm */
\ No newline at end of file
+} /* namespace arm */