Get person avatar icon on a bg thread

We're making a binder call to launcher, and it shouldn't block the main
thread.

Tracking this change and the other changes in the child bugs of b/315143361
under the same generic flag.

Fix: 320274812
Bug: 315143361
Test: posted a few high prio conversation notifs and checked that they
look good on aod, the shelf and status bar
Flag: ACONFIG com.android.systemui.notifications_background_icons DEVELOPMENT

Change-Id: Ie03cf3698c2d46c75012792a5628a5b1068b244b
diff --git a/packages/SystemUI/aconfig/systemui.aconfig b/packages/SystemUI/aconfig/systemui.aconfig
index 8c8975f..56e8c677 100644
--- a/packages/SystemUI/aconfig/systemui.aconfig
+++ b/packages/SystemUI/aconfig/systemui.aconfig
@@ -105,10 +105,10 @@
 }
 
 flag {
-    name: "notifications_background_media_icons"
+    name: "notifications_background_icons"
     namespace: "systemui"
-    description: "Updates icons for media notifications in the background."
-    bug: "315143160"
+    description: "Moves part of the notification icon updates to the background."
+    bug: "315143361"
     metadata {
         purpose: PURPOSE_BUGFIX
     }