ControllerInterface: replace Reinitialize with RefreshDevices

The SDL backend crashes when you close a joystick after SDL_Quit has
been called. Some backends don't need to be shutdown and
re-initialized everytime, we can just ask to enumerate devices again.

Source/Core/InputCommon/ControllerInterface/Android/Android.cpp

@@ -10,7 +10,7 @@ namespace ciface
 {
 namespace Android
 {
-void Init()
+void PopulateDevices()
 {
   for (int i = 0; i < 8; ++i)
     g_controller_interface.AddDevice(std::make_shared<Touchscreen>(i));

Source/Core/InputCommon/ControllerInterface/Android/Android.h

@@ -11,7 +11,7 @@ namespace ciface
 {
 namespace Android
 {
-void Init();
+void PopulateDevices();
 class Touchscreen : public Core::Device
 {
 private: