-Fixed minimizing to popup player does not destroying existing player when drawing over app permission is not granted.

app/src/main/java/org/schabi/newpipe/player/MainVideoPlayer.java

@@ -219,11 +219,10 @@ public final class MainVideoPlayer extends AppCompatActivity
                 getWindow().getAttributes().screenBrightness);
 
         if (playerImpl == null) return;
-        if (isBackPressed) {
-            playerImpl.destroy();
-        } else {
+        if (!isBackPressed) {
             playerImpl.minimize();
         }
+        playerImpl.destroy();
 
         isInMultiWindow = false;
         isBackPressed = false;
@@ -465,7 +464,8 @@ public final class MainVideoPlayer extends AppCompatActivity
                     onFullScreenButtonClicked();
                     break;
                 case PlayerHelper.MinimizeMode.MINIMIZE_ON_EXIT_MODE_NONE:
-                    destroy();
+                default:
+                    // No action
                     break;
             }
         }