input_interpreter: Fix button hold being interpreted incorrectly on init

We reset all the button states to 0 except the first index (which has all the buttons as pressed) to prevent a button hold being interpreted as a button that was pressed once on the first poll.

src/core/frontend/input_interpreter.cpp

@@ -12,7 +12,9 @@ InputInterpreter::InputInterpreter(Core::System& system)
     : npad{system.ServiceManager()
                .GetService<Service::HID::Hid>("hid")
                ->GetAppletResource()
-               ->GetController<Service::HID::Controller_NPad>(Service::HID::HidController::NPad)} {}
+               ->GetController<Service::HID::Controller_NPad>(Service::HID::HidController::NPad)} {
+    ResetButtonStates();
+}
 
 InputInterpreter::~InputInterpreter() = default;
 
@@ -25,6 +27,17 @@ void InputInterpreter::PollInput() {
     button_states[current_index] = button_state;
 }
 
+void InputInterpreter::ResetButtonStates() {
+    previous_index = 0;
+    current_index = 0;
+
+    button_states[0] = 0xFFFFFFFF;
+
+    for (std::size_t i = 1; i < button_states.size(); ++i) {
+        button_states[i] = 0;
+    }
+}
+
 bool InputInterpreter::IsButtonPressed(HIDButton button) const {
     return (button_states[current_index] & (1U << static_cast<u8>(button))) != 0;
 }

src/core/frontend/input_interpreter.h

@@ -66,6 +66,9 @@ public:
     /// Gets a button state from HID and inserts it into the array of button states.
     void PollInput();
 
+    /// Resets all the button states to their defaults.
+    void ResetButtonStates();
+
     /**
      * Checks whether the button is pressed.
      *