Increase spacing in task edit screen

Match Google Calendar spacing

app/src/main/res/layout/control_set_template.xml

@@ -5,8 +5,8 @@
   android:id="@+id/content"
   android:layout_width="fill_parent"
   android:layout_height="wrap_content"
-  android:paddingTop="@dimen/keyline_first"
+  android:paddingTop="@dimen/task_edit_spacing"
-  android:paddingBottom="@dimen/keyline_first"
+  android:paddingBottom="@dimen/task_edit_spacing"
   android:paddingStart="0dp"
   android:paddingEnd="@dimen/keyline_first"
   android:background="?attr/selectableItemBackground"

app/src/main/res/values/dimens.xml

@@ -2,6 +2,7 @@
 <resources>
   <dimen name="half_keyline_first">8dp</dimen>
   <dimen name="quarter_keyline_first">4dp</dimen>
+  <dimen name="task_edit_spacing">20dp</dimen>
   <dimen name="keyline_first">16dp</dimen>
   <dimen name="keyline_second">32dp</dimen>
   <dimen name="keyline_content_inset">72dp</dimen>