Change all apps handle color to outLineVariant.

Before the change the color was colorSurfaceVariant but should be updated to outlineVariant.

bug:275087095
Test: Manual -
Before darkTheme:https://screenshot.googleplex.com/94KykP7mjhBsKUc
After darkTheme:https://screenshot.googleplex.com/3N5XaSRonQkFuis
Before lightTheme:https://screenshot.googleplex.com/BNigdK4GWgSe2fm
After lightTheme: https://screenshot.googleplex.com/3Li5DUCDxXeACac
Flag: None

Change-Id: Ie7b077e05108d53dab869fcc1225ddae993207f2
diff --git a/res/drawable/bg_rounded_corner_bottom_sheet_handle.xml b/res/drawable/bg_rounded_corner_bottom_sheet_handle.xml
index c502178..379e0e5 100644
--- a/res/drawable/bg_rounded_corner_bottom_sheet_handle.xml
+++ b/res/drawable/bg_rounded_corner_bottom_sheet_handle.xml
@@ -17,6 +17,6 @@
 <shape xmlns:android="http://schemas.android.com/apk/res/android"
     xmlns:androidprv="http://schemas.android.com/apk/prv/res/android"
     android:shape="rectangle" >
-    <solid android:color="?androidprv:attr/colorSurfaceVariant"/>
+    <solid android:color="?androidprv:attr/materialColorOutlineVariant"/>
     <corners android:radius="@dimen/bottom_sheet_handle_corner_radius" />
 </shape>