styles: cleanup for API 21+

Change-Id: Ibc167cd19b4c7916060a13758ca945dfe281a9bf
diff --git a/ring-android/app/src/main/res/values/dimens.xml b/ring-android/app/src/main/res/values/dimens.xml
index 7ed8ded..ccdda6c 100644
--- a/ring-android/app/src/main/res/values/dimens.xml
+++ b/ring-android/app/src/main/res/values/dimens.xml
@@ -29,9 +29,9 @@
     <dimen name="activity_horizontal_margin">32dp</dimen>
     <dimen name="activity_vertical_margin">16dp</dimen>
 
-    <dimen name="action_button_lpadding">0dp</dimen>
-    <dimen name="action_button_bpadding">-45dp</dimen>
-    <dimen name="fab_compat_margin">0dp</dimen>
+    <dimen name="action_button_lpadding">16dp</dimen>
+    <dimen name="action_button_bpadding">-20dp</dimen>
+    <dimen name="fab_compat_margin">16dp</dimen>
 
     <dimen name="alert_dialog_side_padding_list_view">16dp</dimen>