Fix default audio backend on Android being "No audio output"

People who already have encountered the problem will need to
manually change the audio backend (or delete the config INI).

Source/Core/AudioCommon/AudioCommon.cpp

@@ -95,15 +95,15 @@ void ShutdownSoundStream()
 std::string GetDefaultSoundBackend()
 {
   std::string backend = BACKEND_NULLSOUND;
-#if defined __linux__
+#if defined ANDROID
+  backend = BACKEND_OPENSLES;
+#elif defined __linux__
   if (AlsaSound::isValid())
     backend = BACKEND_ALSA;
 #elif defined __APPLE__
   backend = BACKEND_COREAUDIO;
 #elif defined _WIN32
   backend = BACKEND_XAUDIO2;
-#elif defined ANDROID
-  backend = BACKEND_OPENSLES;
 #endif
   return backend;
 }