Overlaying status_bar_system_icon_size to fix system icon size

This attribute was added to make the system status bar icons overlayable.
The core platform logic that uses this attr now makes sure all status
bar icons are scaled to the same size.
Reduced the size a little bit since they looked too big otherwise.

Fixes: 132354163
Test: manual
Change-Id: I220c0fa7e4dcf74889c68bc0ba5e27f2c3da63e4
diff --git a/car_product/overlay/frameworks/base/core/res/res/values/dimens.xml b/car_product/overlay/frameworks/base/core/res/res/values/dimens.xml
index aed2a41..c005792 100644
--- a/car_product/overlay/frameworks/base/core/res/res/values/dimens.xml
+++ b/car_product/overlay/frameworks/base/core/res/res/values/dimens.xml
@@ -23,7 +23,11 @@
     <dimen name="car_qs_header_system_icons_area_height">76dp</dimen>
     <dimen name="navigation_bar_height">112dp</dimen>
     <dimen name="navigation_bar_height_landscape">112dp</dimen>
-    <dimen name="status_bar_icon_size">36dp</dimen>
+
+    <!-- Notification icon size in the status bar. -->
+    <dimen name="status_bar_icon_size">32dp</dimen>
+    <!-- System status icon size in the status bar. -->
+    <dimen name="status_bar_system_icon_size">32dp</dimen>
 
     <!-- The size of the right icon. This size is used to down-sample the bitmaps for "large icon". -->
     <dimen name="notification_right_icon_size">@*android:dimen/car_touch_target_size</dimen>