android: Fix A button preference key

src/android/app/src/main/java/org/yuzu/yuzu_emu/features/settings/model/Settings.kt

@@ -111,7 +111,7 @@ class Settings {
         const val PREF_OVERLAY_INIT = "OverlayInit"
         const val PREF_CONTROL_SCALE = "controlScale"
         const val PREF_TOUCH_ENABLED = "isTouchEnabled"
-        const val PREF_BUTTON_TOGGLE_0 = "buttonToggleO"
+        const val PREF_BUTTON_TOGGLE_0 = "buttonToggle0"
         const val PREF_BUTTON_TOGGLE_1 = "buttonToggle1"
         const val PREF_BUTTON_TOGGLE_2 = "buttonToggle2"
         const val PREF_BUTTON_TOGGLE_3 = "buttonToggle3"