[android] Fix: Prevent crash on Bluetooth controller disconnect

src/android/app/src/main/java/org/yuzu/yuzu_emu/utils/InputHandler.kt

@@ -37,8 +37,12 @@ object InputHandler {
     }
 
     fun dispatchGenericMotionEvent(event: MotionEvent): Boolean {
-        val controllerData =
+    var controllerData = androidControllers[event.device.controllerNumber]
-            androidControllers[event.device.controllerNumber] ?: return false
+    if (controllerData == null) {
+        updateControllerData()
+        controllerData = androidControllers[event.device.controllerNumber] ?: return false
+    }
+
     event.device.motionRanges.forEach {
         NativeInput.onGamePadAxisEvent(
             controllerData.getGUID(),