Make styles of news consistent

app/src/main/res/layout/news_article_card.xml

 <?xml version="1.0" encoding="utf-8"?>
-<android.support.v7.widget.CardView xmlns:android="http://schemas.android.com/apk/res/android"
-    xmlns:card_view="http://schemas.android.com/apk/res-auto"
+<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
     android:layout_width="match_parent"
     android:layout_height="wrap_content"
     android:layout_marginBottom="4dp"
     android:layout_marginLeft="8dp"
     android:layout_marginRight="8dp"
     android:layout_marginTop="4dp"
-    card_view:cardCornerRadius="1dp"
-    card_view:cardElevation="1dp">
+    android:background="#f2f2f2">
 
     <LinearLayout
         android:layout_width="match_parent"
@@ -60,4 +58,4 @@
             android:textColor="#000000"
             android:textColorLink="@color/colorPrimary" />
     </LinearLayout>
-</android.support.v7.widget.CardView>
\ No newline at end of file
+</LinearLayout>