some minor cleanups

* Suppress warnings about conflicting library names in platformio.ini by
  explicitly picking the libraries by id that we want.
* fix unused static function warning by making it not static ;)
* declare arduino-fsm as dependency for BluetoothOTA. Hopefully this
  fixes the CI builds?

Tested: `pio run` builds.

src/screen.h

@@ -3,6 +3,7 @@
 #include "PeriodicTask.h"
 
 void screen_print(const char * text);
+void screen_print(const char * text, uint8_t x, uint8_t y, uint8_t alignment);
 
 
 // Show the bluetooth PIN screen
@@ -36,4 +37,4 @@ public:
     void onPress();
 };
 
-extern Screen screen;
+extern Screen screen;