windows: Move IMMDevice work to common file, implement DirectSound enumeration support

VisualC/SDL/SDL.vcxproj

@@ -305,6 +305,7 @@
     <ClInclude Include="..\..\src\audio\winmm\SDL_winmm.h" />
     <ClInclude Include="..\..\src\core\windows\SDL_directx.h" />
     <ClInclude Include="..\..\src\core\windows\SDL_hid.h" />
+    <ClInclude Include="..\..\src\core\windows\SDL_immdevice.h" />
     <ClInclude Include="..\..\src\core\windows\SDL_windows.h" />
     <ClInclude Include="..\..\src\core\windows\SDL_xinput.h" />
     <ClInclude Include="..\..\src\dynapi\SDL_dynapi.h" />
@@ -456,6 +457,7 @@
     <ClCompile Include="..\..\src\audio\wasapi\SDL_wasapi.c" />
     <ClCompile Include="..\..\src\audio\wasapi\SDL_wasapi_win32.c" />
     <ClCompile Include="..\..\src\core\windows\SDL_hid.c" />
+    <ClCompile Include="..\..\src\core\windows\SDL_immdevice.c" />
     <ClCompile Include="..\..\src\core\windows\SDL_windows.c" />
     <ClCompile Include="..\..\src\core\windows\SDL_xinput.c" />
     <ClCompile Include="..\..\src\cpuinfo\SDL_cpuinfo.c" />

VisualC/SDL/SDL.vcxproj.filters

@@ -432,6 +432,9 @@
     <ClInclude Include="..\..\src\core\windows\SDL_hid.h">
       <Filter>core\windows</Filter>
     </ClInclude>
+    <ClInclude Include="..\..\src\core\windows\SDL_immdevice.h">
+      <Filter>core\windows</Filter>
+    </ClInclude>
     <ClInclude Include="..\..\src\core\windows\SDL_windows.h">
       <Filter>core\windows</Filter>
     </ClInclude>
@@ -869,6 +872,9 @@
     <ClCompile Include="..\..\src\core\windows\SDL_hid.c">
       <Filter>core\windows</Filter>
     </ClCompile>
+    <ClCompile Include="..\..\src\core\windows\SDL_immdevice.c">
+      <Filter>core\windows</Filter>
+    </ClCompile>
     <ClCompile Include="..\..\src\core\windows\SDL_windows.c">
       <Filter>core\windows</Filter>
     </ClCompile>