Update All Set screen background colors to match specs

Flag: NONE fully released, color update
Fixes: 345702208
Fixes: 322080618
Test: Launched All Set screen
Change-Id: I432f5d686ffb714bdccb3881d948242661191a0d
diff --git a/quickstep/res/values-night/colors.xml b/quickstep/res/values-night/colors.xml
index 8d03ce6..94100ba 100644
--- a/quickstep/res/values-night/colors.xml
+++ b/quickstep/res/values-night/colors.xml
@@ -22,7 +22,7 @@
     <color name="mock_webpage_url_bar">#202124</color>
     <color name="mock_webpage_url_bar_item">#3c4043</color>
 
-    <color name="all_set_page_background">#FF000000</color>
+    <color name="all_set_page_background">@android:color/system_neutral1_900</color>
 
     <!-- Turn on work apps button -->
     <color name="work_turn_on_stroke">?androidprv:attr/colorAccentSecondaryVariant</color>
diff --git a/quickstep/res/values/colors.xml b/quickstep/res/values/colors.xml
index 14a916f..0f997f9 100644
--- a/quickstep/res/values/colors.xml
+++ b/quickstep/res/values/colors.xml
@@ -76,7 +76,7 @@
     <color name="mock_webpage_top_bar_item">#80868b</color>
     <color name="mock_webpage_page_text">#bdc1c6</color>
 
-    <color name="all_set_page_background">#FFFFFFFF</color>
+    <color name="all_set_page_background">@android:color/system_neutral1_50</color>
 
     <!-- Recents overview -->
     <color name="recents_filter_icon">#333333</color>