Enlarging group header for vertical layout on tablet.

The account email was partially cut off at the bottom in tablet vertical
mode.  This is because the header is shown as two lines in this mode.

Changed to wrapContent/minHeight to ensure lines are shown.

Bug: 8895550
Change-Id: I3c281fd00d47142635906d2988e7720b55c2fe70
diff --git a/res/layout/group_account_header_vertical.xml b/res/layout/group_account_header_vertical.xml
index 27e4da4..0b3b681 100644
--- a/res/layout/group_account_header_vertical.xml
+++ b/res/layout/group_account_header_vertical.xml
@@ -17,11 +17,13 @@
 <LinearLayout
     xmlns:android="http://schemas.android.com/apk/res/android"
     android:layout_width="match_parent"
-    android:layout_height="?attr/list_item_header_height"
+    android:layout_height="wrap_content"
+    android:minHeight="?attr/list_item_header_height"
     android:layout_marginLeft="?attr/list_item_padding_left"
     android:layout_marginRight="?attr/list_item_padding_right"
     android:layout_marginStart="?attr/list_item_padding_left"
     android:layout_marginEnd="?attr/list_item_padding_right"
+    android:paddingBottom="6dip"
     android:background="@drawable/list_section_divider_holo_custom"
     android:gravity="center_vertical"
     android:orientation="vertical">