Handle file drop from input_manager

A file is pushed (or an apk is installed) to the device on file drop.
This behavior is specific to the screen and its input_manager.

app/src/screen.c

@@ -485,6 +485,7 @@ sc_screen_init(struct sc_screen *screen,
 
     struct sc_input_manager_params im_params = {
         .controller = params->controller,
+        .fp = params->fp,
         .screen = screen,
         .kp = params->kp,
         .mp = params->mp,