Remove illegal @+ use with dimen type

@+id/foo is a way to specify an ID or create one if it doesn't exist.
This is fine to do because an ID is simply a placeholder value that is
assigned a resource ID.
@+dimen/foo doesn't make sense because there is no implicit value to
create if the resource doesn't exist.

Bug: 37716235
Test: builds
Change-Id: Ic897b208fd338bc00ac47de04ea74f0993e6a052
diff --git a/res/layout/sticky_bottom_capture_layout.xml b/res/layout/sticky_bottom_capture_layout.xml
index 6d98c30..fe0d316 100644
--- a/res/layout/sticky_bottom_capture_layout.xml
+++ b/res/layout/sticky_bottom_capture_layout.xml
@@ -23,8 +23,8 @@
 
     <com.android.camera.widget.RoundedThumbnailView
         android:id="@+id/rounded_thumbnail_view"
-        android:layout_width="@+dimen/rounded_thumbnail_ripple_ring_diameter_max"
-        android:layout_height="@+dimen/rounded_thumbnail_ripple_ring_diameter_max"
+        android:layout_width="@dimen/rounded_thumbnail_ripple_ring_diameter_max"
+        android:layout_height="@dimen/rounded_thumbnail_ripple_ring_diameter_max"
         android:visibility="invisible" />
 
     <include layout="@layout/mode_options_overlay" />