Make logo icon have an independent size compared to the nav-icon.

Bug: 144105957
Test: Manual on device
Change-Id: I1f27f8d4d65e90601eb1c0fb531890d19126709a
diff --git a/car-ui-lib/res/values/dimens.xml b/car-ui-lib/res/values/dimens.xml
index 679e1a8..ff11e4c 100644
--- a/car-ui-lib/res/values/dimens.xml
+++ b/car-ui-lib/res/values/dimens.xml
@@ -72,8 +72,10 @@
     <!-- Toolbar title/tabs start margin. Toolbar navigation icon (or logo if no navigation icon is
     used) will be centered in this space, and the title will start from here -->
     <dimen name="car_ui_toolbar_margin">@dimen/car_ui_margin</dimen>
-    <!-- Navigation icon or logo size -->
+    <!-- Navigation icon -->
     <dimen name="car_ui_toolbar_icon_size">@dimen/car_ui_primary_icon_size</dimen>
+    <!-- Logo -->
+    <dimen name="car_ui_toolbar_logo_size">@dimen/car_ui_primary_icon_size</dimen>
     <!-- Margin between the logo and the title, when both logo and navigation icons are used -->
     <dimen name="car_ui_toolbar_title_logo_padding">0dp</dimen>
     <!-- Margin at the start of the title -->