Fix some background overdraw

src/main/res/layout-w820dp/task_list_activity.xml

@@ -7,7 +7,6 @@
     <LinearLayout
         android:layout_width="match_parent"
         android:layout_height="match_parent"
-        android:background="?attr/asContentBackground"
         android:orientation="horizontal"
         android:baselineAligned="false">
 

src/main/res/layout/task_list_activity.xml

@@ -7,8 +7,7 @@
     <FrameLayout
         android:id="@+id/single_pane"
         android:layout_width="match_parent"
-        android:layout_height="match_parent"
-        android:background="?attr/asContentBackground" />
+        android:layout_height="match_parent" />
 
     <include layout="@layout/navigation_drawer" />
 

src/main/res/layout/task_list_body_empty.xml

@@ -1,6 +1,7 @@
 <android.support.v4.widget.SwipeRefreshLayout xmlns:android="http://schemas.android.com/apk/res/android"
     android:id="@+id/swipe_layout_empty"
     style="@style/task_list_container"
+    android:background="?attr/asContentBackground"
     android:layout_width="fill_parent"
     android:layout_height="wrap_content"
     android:elevation="@dimen/elevation_task_list">

src/main/res/values-w820dp/styles.xml

@@ -1,6 +1,6 @@
 <?xml version="1.0" encoding="utf-8"?>
 <resources>
-    <style name="task_list_container" parent="task_list_container_base">
+    <style name="task_list_container">
         <item name="android:clipToPadding">false</item>
         <item name="android:paddingRight">@dimen/elevation_padding</item>
         <item name="android:paddingEnd">@dimen/elevation_padding</item>

src/main/res/values/styles.xml

@@ -67,11 +67,7 @@
 
     <!-- ==================================================== TaskAdapter == -->
 
-    <style name="task_list_container_base">
-        <item name="android:background">?attr/asContentBackground</item>
-    </style>
-
-    <style name="task_list_container" parent="task_list_container_base"/>
+    <style name="task_list_container"/>
 
     <style name="TextAppearance.TAd_ItemTitle">
         <item name="android:textColorLink">#ff88aaff</item>