Change the background of call log.

Currently, different parts of the call log have different background
colors. Change them all to have the same color, by removing the custom
backgrounds from the call action, group action, and child list items.

Change-Id: I442fa14c7fed49908a7fef0c4d03cbd94f1d4f4e
diff --git a/res/layout/call_log_action_call.xml b/res/layout/call_log_action_call.xml
index 53c343c..747daa7 100644
--- a/res/layout/call_log_action_call.xml
+++ b/res/layout/call_log_action_call.xml
@@ -24,7 +24,6 @@
         android:paddingRight="14dip"
         android:layout_alignParentRight="true"
         android:gravity="center_vertical"
-        android:background="@drawable/call_background"
         android:src="@android:drawable/sym_action_call"
     />
 
diff --git a/res/layout/call_log_action_group.xml b/res/layout/call_log_action_group.xml
index 0b130b6..fa6bb79 100644
--- a/res/layout/call_log_action_group.xml
+++ b/res/layout/call_log_action_group.xml
@@ -24,7 +24,6 @@
         android:paddingRight="13dip"
         android:layout_alignParentRight="true"
         android:gravity="center_vertical"
-        android:background="@drawable/call_background"
         android:src="@*android:drawable/expander_ic_minimized"
     />
 
diff --git a/res/layout/call_log_list_child_item.xml b/res/layout/call_log_list_child_item.xml
index 68e1360..10e09a4 100644
--- a/res/layout/call_log_list_child_item.xml
+++ b/res/layout/call_log_list_child_item.xml
@@ -18,7 +18,6 @@
     android:layout_width="match_parent"
     android:layout_height="?android:attr/listPreferredItemHeight"
     android:paddingLeft="7dip"
-    android:background="@drawable/list_item_background_secondary"
 >
 
     <include layout="@layout/call_log_action_call"/>