Tweak enrollment intro layout

Bug: 130740447

Test: Builds
Change-Id: If3b4ad795588586dcd6fb848bee213df0ae1095e
(cherry picked from commit 6deedd0bf32ffe278b76841ee070a9234f361fe0)
diff --git a/res/layout/face_enroll_introduction.xml b/res/layout/face_enroll_introduction.xml
index 71a02db..900f378 100644
--- a/res/layout/face_enroll_introduction.xml
+++ b/res/layout/face_enroll_introduction.xml
@@ -74,14 +74,15 @@
         <Space
             android:layout_width="0dp"
             android:layout_height="0dp"
-            android:layout_weight="2"/>
+            android:layout_weight="1"/>
 
         <!-- Contains the buttons and extra information text at the bottom -->
         <LinearLayout
             android:layout_width="match_parent"
             android:layout_height="wrap_content"
             android:orientation="vertical"
-            android:layout_gravity="center_horizontal|bottom">
+            android:layout_gravity="center_horizontal|bottom"
+            android:layout_marginTop="24dp">
 
             <FrameLayout
                 android:layout_width="match_parent"