Move notifying userActivity to background thread in password textview

moving the the powermanager.userActivity call in password text view to
the background thread. this call signals to the system that the
useractivity has occured and in password text view this is called when
the text is appended/deleted/reset in the textview.

moving this call to onUserActivity listener impl in keyguardabskeyinputviewcontroller,
in which its called on background thread.

Test: checked perfetto binder transaction
Bug: 325203885
Flag: com.android.systemui.notify_password_text_view_user_activity_in_background

Change-Id: Id4533dca5452d03803a369a1026cae70e047c3c7
diff --git a/packages/SystemUI/aconfig/systemui.aconfig b/packages/SystemUI/aconfig/systemui.aconfig
index 1ce1716..2e0c1ef 100644
--- a/packages/SystemUI/aconfig/systemui.aconfig
+++ b/packages/SystemUI/aconfig/systemui.aconfig
@@ -1373,6 +1373,16 @@
 }
 
 flag {
+    name: "notify_password_text_view_user_activity_in_background"
+    namespace: "systemui"
+    description: "Decide whether to notify the user activity in password text view, to power manager in the background thread."
+    bug: "346882515"
+    metadata {
+        purpose: PURPOSE_BUGFIX
+    }
+}
+
+flag {
     name: "face_message_defer_update"
     namespace: "systemui"
     description: "Only analyze the last n frames when determining whether to defer a face auth help message like low light"