Size and position the donut.

Change-Id: I06801bfb342be6ded2743f12998371e1aee49ba9
Fixes: 36224169
Test: Manual

res/layout/storage_summary_donut.xml

@@ -67,9 +67,9 @@
 
     <com.android.settings.widget.DonutView
         android:id="@+id/donut"
-        android:layout_width="100dp"
-        android:layout_height="100dp"
-        android:layout_marginEnd="48dp"
+        android:layout_width="112dp"
+        android:layout_height="112dp"
+        android:layout_marginEnd="16dp"
         android:gravity="end|center_vertical"
         android:minWidth="58dp"
         android:paddingStart="?android:attr/listPreferredItemPaddingStart"

src/com/android/settings/widget/DonutView.java

@@ -44,7 +44,7 @@ public class DonutView extends View {
     public DonutView(Context context, AttributeSet attrs) {
         super(context, attrs);
         float density = getResources().getDisplayMetrics().density;
-        mStrokeWidth = 10f * density;
+        mStrokeWidth = 6f * density;
 
         mBackgroundCircle = new Paint();
         mBackgroundCircle.setAntiAlias(true);