Extract default intervals and coalesce methods into their own file / static class methods (#3425)

* Extract default intervals and coalesce methods into their own file / static class methods

* Missed pax

* Still managed to miss one

src/mesh/PhoneAPI.cpp

@@ -1,5 +1,6 @@
 #include "PhoneAPI.h"
 #include "Channels.h"
+#include "Default.h"
 #include "GPS.h"
 #include "MeshService.h"
 #include "NodeDB.h"