Revert "[공통][Common] 키보드 등장시 content 백그라운드 색 검정에서 -> 흰색 변경"

This reverts commit af1c9fde09936c3b5bcf4923de6165100ed9eeff.

app/src/main/java/kr/co/zumo/app/lifeplus/view/custom/FullScreenWithKeyBoardLayout.java

@@ -10,7 +10,6 @@ import android.view.View;
 import android.view.WindowManager;
 import android.widget.FrameLayout;
 
-import kr.co.zumo.app.R;
 import kr.co.zumo.app.lifeplus.application.App;
 import kr.co.zumo.app.lifeplus.util.AppUtil;
 import kr.co.zumo.app.lifeplus.util.ResourceUtil;
@@ -38,13 +37,12 @@ public class FullScreenWithKeyBoardLayout {
   private FrameLayout.LayoutParams frameLayoutParams;
   private int statusBarHeight = ResourceUtil.getStatusBarHeight();
   private Runnable listener;
-  private FrameLayout parentContent;
 
   private FullScreenWithKeyBoardLayout(Activity activity, Runnable listener) {
     this.listener = listener;
     isFullScreenVersion = AppUtil.isFullScreenVersion();
 
-    parentContent = activity.findViewById(android.R.id.content);
+    FrameLayout parentContent = activity.findViewById(android.R.id.content);
     childContent = parentContent.getChildAt(0);
     childContent.getViewTreeObserver().addOnGlobalLayoutListener(this::possiblyResizeChildOfContent);
 
@@ -67,8 +65,6 @@ public class FullScreenWithKeyBoardLayout {
           //keyboard probably just became visible
           heightDifference = heightDifference - ResourceUtil.getStatusBarHeightManual();
           frameLayoutParams.height = usableHeightSansKeyboard - heightDifference;
-          //키보드 등장시 검은색 -> 흰색 변경
-          parentContent.setBackgroundColor(ResourceUtil.getColor(R.color.CFFFFFF));
         }
         else {
           //keyboard probably just became hidden