Fix the RTL problem of SwipeToUnlockView

Fixes #1578 problem number 6

application/vlc-android/src/org/videolan/vlc/gui/view/SwipeToUnlockView.kt

@@ -31,6 +31,7 @@ import android.text.SpannableString
 import android.text.Spanned
 import android.text.style.MaskFilterSpan
 import android.util.AttributeSet
+import android.util.LayoutDirection
 import android.util.Log
 import android.view.KeyEvent
 import android.view.LayoutInflater
@@ -101,7 +102,10 @@ class SwipeToUnlockView : ConstraintLayout {
     override fun onTouchEvent(event: MotionEvent?): Boolean {
         if (unlocking) return super.onTouchEvent(event)
         event?.let { event ->
-            val currentX = event.x.toInt().coerceAtLeast(extremum).coerceAtMost(width - extremum)
+            val currentX = event.x.toInt().coerceAtLeast(extremum).coerceAtMost(width - extremum).run {
+                if (layoutDirection == LayoutDirection.RTL) width - this
+                else this
+            }
 
             when (event.action) {
                 MotionEvent.ACTION_DOWN -> {