building for android impl

currently builds a "Metaforce" apk, will need to change name of course. Running the apk using Android Studio's emulator can get in game, however running on a samsung phone does not seem to work.

src/dusk/extras.c

@@ -54,7 +54,7 @@ void *_memcpy(void* dest, void const* src, int n) {
 }
 
 void DCZeroRange(void* addr, uint32_t nBytes) {
-#ifdef _MSC_VER
+#if defined(_MSC_VER) || ANDROID
     memset(addr, 0, nBytes);
 #else
     bzero(addr, nBytes);

src/dusk/imgui/ImGuiPreLaunchWindow.cpp

@@ -98,7 +98,7 @@ void ImGuiPreLaunchWindow::drawMainMenu() {
 
     ImGui::PushFont(ImGuiEngine::fontLarge);
 
-    if (m_selectedIsoPath.empty() || !SDL_GetPathInfo(m_selectedIsoPath.c_str(), nullptr)) {
+    if (!isSelectedPathValid()) {
         if (ImGuiButtonCenter("Select disc image...")) {
             SDL_ShowOpenFileDialog(&fileDialogCallback, this, aurora::window::get_sdl_window(),
                                    skGameDiscFileFilters.data(), int(skGameDiscFileFilters.size()),