Add blur effect to predictive back-to-home animation

Bug: 342178850
Flag: com.android.launcher3.predictive_back_to_home_blur
Test: Manual, i.e. testing predictive back-to-home animation on device
Change-Id: I6295353d910ad8597477b722de3a87f93ee0297c
diff --git a/aconfig/launcher.aconfig b/aconfig/launcher.aconfig
index f0a9cba..c3fb150 100644
--- a/aconfig/launcher.aconfig
+++ b/aconfig/launcher.aconfig
@@ -554,3 +554,13 @@
     purpose: PURPOSE_BUGFIX
   }
 }
+
+flag {
+  name: "predictive_back_to_home_blur"
+  namespace: "launcher"
+  description: "Adds blur for predictive back-to-home"
+  bug: "342178850"
+  metadata {
+    purpose: PURPOSE_BUGFIX
+  }
+}