Fix Notifications Settings padding

- make it consistent with the rest of the Settings App

See bug: #15384992 Setting Dashboard - padding updates

Change-Id: I5ac608772070870e5fdcd10257e9f81fe65f08ac

res/layout/notification_app_list.xml

@@ -18,7 +18,8 @@
 <LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
     android:layout_width="match_parent"
     android:layout_height="match_parent"
-    android:orientation="vertical" >
+    android:orientation="vertical"
+    android:paddingStart="?android:attr/listPreferredItemPaddingStart">
 
     <ListView
         android:id="@android:id/list"

res/layout/zen_mode_section.xml

@@ -16,6 +16,8 @@
 <LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
     android:layout_width="match_parent"
     android:layout_height="wrap_content"
+    android:paddingStart="?android:attr/listPreferredItemPaddingStart"
+    android:paddingEnd="?android:attr/listPreferredItemPaddingEnd"
     android:orientation="vertical" >
 
     <View

res/layout/zen_mode_section_first.xml

@@ -16,7 +16,9 @@
 <LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
     android:layout_width="match_parent"
     android:layout_height="wrap_content"
-    android:orientation="vertical" >
+    android:orientation="vertical"
+    android:paddingStart="?android:attr/listPreferredItemPaddingStart"
+    android:paddingEnd="?android:attr/listPreferredItemPaddingEnd">
 
     <TextView
         android:id="@android:id/title"