Misc clean up. move widgets from graph to widget package.

Bug: n/a
Test: robotests, rebuild
Change-Id: I910f355312d52e81a0bf57b46a3f267e1eb9882a

res/layout/battery_history_detail.xml

@@ -49,7 +49,7 @@
                 android:textAppearance="?android:attr/textAppearanceMedium"
                 android:textColor="?android:attr/textColorSecondary"/>
 
-            <com.android.settings.graph.UsageView
+            <com.android.settings.widget.UsageView
                 android:id="@+id/battery_usage"
                 android:layout_width="match_parent"
                 android:layout_height="141dp"

res/layout/battery_usage_graph.xml

@@ -33,7 +33,7 @@
         android:textSize="36sp"
         android:textColor="?android:attr/colorAccent" />
 
-    <com.android.settings.graph.UsageView
+    <com.android.settings.widget.UsageView
         android:id="@+id/battery_usage"
         android:layout_width="match_parent"
         android:layout_height="141dp"

res/layout/data_usage_graph.xml

@@ -22,7 +22,7 @@
     android:paddingEnd="?android:attr/listPreferredItemPaddingEnd"
     android:orientation="vertical">
 
-    <com.android.settings.graph.UsageView
+    <com.android.settings.widget.UsageView
         android:id="@+id/data_usage"
         android:layout_width="match_parent"
         android:layout_height="@dimen/data_usage_chart_height"

res/layout/usage_view.xml

@@ -57,7 +57,7 @@
 
         </LinearLayout>
 
-        <com.android.settings.graph.UsageGraph
+        <com.android.settings.widget.UsageGraph
             android:id="@+id/usage_graph"
             android:layout_width="match_parent"
             android:layout_height="match_parent"
@@ -76,7 +76,7 @@
             android:id="@+id/bottom_label_space"
             android:layout_width="@dimen/usage_graph_labels_width"
             android:layout_height="wrap_content"/>
-        <com.android.settings.graph.BottomLabelLayout
+        <com.android.settings.widget.BottomLabelLayout
             android:layout_width="0dp"
             android:layout_height="wrap_content"
             android:layout_weight="1"
@@ -93,7 +93,7 @@
 
             <include android:id="@+id/label_end"
                      layout="@layout/usage_side_label" />
-        </com.android.settings.graph.BottomLabelLayout>
+        </com.android.settings.widget.BottomLabelLayout>
     </LinearLayout>
 
 </LinearLayout>