refactor into files

src/main/cpp/CMakeLists.txt

@@ -11,6 +11,10 @@ add_library(mosis-service SHARED
     mosis-service.cpp
     com/omixlab/mosis/IMosisService.cpp
     com/omixlab/mosis/IMosisListener.cpp
+    assets_manager.cpp
+    shader.cpp
+    external_texture.cpp
+    quad.cpp
     egl_context.cpp
     logger.cpp
     glad/src/egl.c
@@ -24,6 +28,10 @@ add_library(mosis-test SHARED
     com/omixlab/mosis/IMosisService.cpp
     com/omixlab/mosis/IMosisListener.cpp
     mosis-test.cpp
+    assets_manager.cpp
+    shader.cpp
+    external_texture.cpp
+    quad.cpp
     egl_context.cpp
     logger.cpp
     glad/src/egl.c