Sharesheet - make DS loading gradient more subtle

Currently the direct share loading gradient is loud and draws
attention despite the fact that it may not loading anything.
Update colors to draw less attention.

Fixes: 132917868
Test: manual
Change-Id: I63d2993d2315520688b07731221fad3fcff25f74
diff --git a/core/res/res/values/colors_device_defaults.xml b/core/res/res/values/colors_device_defaults.xml
index c60b399..5ba1d4e 100644
--- a/core/res/res/values/colors_device_defaults.xml
+++ b/core/res/res/values/colors_device_defaults.xml
@@ -50,8 +50,9 @@
     <color name="list_divider_color_dark">#85ffffff</color>
     <color name="list_divider_opacity_device_default_light">@android:color/white</color>
     <color name="list_divider_opacity_device_default_dark">@android:color/white</color>
-    <color name="loading_gradient_background_color_dark">#2D3033</color>
-    <color name="loading_gradient_background_color_light">#DADCE0</color>
-    <color name="loading_gradient_highlight_color_dark">#3C4043</color>
+
+    <color name="loading_gradient_background_color_dark">#44484C</color>
+    <color name="loading_gradient_background_color_light">#F8F9FA</color>
+    <color name="loading_gradient_highlight_color_dark">#4D5155</color>
     <color name="loading_gradient_highlight_color_light">#F1F3F4</color>
 </resources>