Decreased elevation/shadows for FAB

FAB (floating action button) has slightly lower depth for
sharper shadow contrast.

Bug: 15385828
Change-Id: Ida1c9e94fde77678a6a1d4d22557ee05882ab50c
diff --git a/res-common/values/dimens.xml b/res-common/values/dimens.xml
index e366689..a76298c 100644
--- a/res-common/values/dimens.xml
+++ b/res-common/values/dimens.xml
@@ -98,7 +98,7 @@
     <!-- Corner radius of the floating action button -->
     <dimen name="floating_action_button_radius">28dp</dimen>
     <!-- Z translation of the floating action button -->
-    <dimen name="floating_action_button_translation_z">5dp</dimen>
+    <dimen name="floating_action_button_translation_z">1dp</dimen>
     <!-- Padding to be applied to the bottom of lists to make space for the floating action
          button -->
     <dimen name="floating_action_button_list_bottom_padding">88dp</dimen>