refactor(hid): improve keyboard layout compatibility in HID handling functions

Signed-off-by: luckfox-eng29 <eng29@luckfox.com>

internal/usbgadget/usbgadget.go

@@ -82,6 +82,9 @@ type UsbGadget struct {
 	onKeyboardStateChange *func(state KeyboardState)
 	onHidDeviceMissing    *func(device string, err error)
 
+	keysDownState       KeysDownState
+	autoReleaseTimers   []autoReleaseTimer
+
 	log *zerolog.Logger
 
 	logSuppressionCounter map[string]int