Add flag to control whether wait application is killed

Bug: 31009094
Test: build pass
Change-Id: Ib70a73465a65a183a436f5606bef89adb702a06a
diff --git a/core/java/android/content/pm/flags.aconfig b/core/java/android/content/pm/flags.aconfig
index 45591d7..1f9ed4b 100644
--- a/core/java/android/content/pm/flags.aconfig
+++ b/core/java/android/content/pm/flags.aconfig
@@ -242,6 +242,14 @@
 }
 
 flag {
+    name: "wait_application_killed"
+    namespace: "package_manager_service"
+    description: "Feature flag to control whether to wait until the application is killed when clear application data"
+    bug: "31009094"
+    is_fixed_read_only: true
+}
+
+flag {
     name: "component_state_changed_metrics"
     namespace: "package_manager_service"
     description: "Feature flag to log the metrics when the component state is changed."