Register xml parsing receiver on background thread

One of a11yManagerService's receivers performs xml parsing.
Since this can take a while, the receiver should be registered on the background thread.

Test: atest AccessibilityManagerServiceTest (you'll need to verify via printing or breakpoints that the receiver is on the right thread)
Flag: aconfig manager_avoid_receiver_timeout
Bug: 333890389
Change-Id: I1ee6617fe1a4471d251c7a6d4c52b82a788776b1
(cherry picked from commit cb211281159d1f500c521afe8eaa53a9eb22b559)

2 files changed, 13 insertions, 1 deletions

diff --git a/services/accessibility/accessibility.aconfig b/services/accessibility/accessibility.aconfig
index a754ba547767..90e31f2e8d4c 100644
--- a/services/accessibility/accessibility.aconfig
+++ b/services/accessibility/accessibility.aconfig
@@ -83,6 +83,16 @@ flag {
 }
 
 flag {
+    name: "manager_avoid_receiver_timeout"
+    namespace: "accessibility"
+    description: "Register receivers on background handler so they have more time to complete"
+    bug: "333890389"
+    metadata {
+        purpose: PURPOSE_BUGFIX
+    }
+}
+
+flag {
     name: "pinch_zoom_zero_min_span"
     namespace: "accessibility"
     description: "Whether to set min span of ScaleGestureDetector to zero."
diff --git a/services/accessibility/java/com/android/server/accessibility/AccessibilityManagerService.java b/services/accessibility/java/com/android/server/accessibility/AccessibilityManagerService.java
index cbb66dc18f28..fe99ffd8a649 100644
--- a/services/accessibility/java/com/android/server/accessibility/AccessibilityManagerService.java
+++ b/services/accessibility/java/com/android/server/accessibility/AccessibilityManagerService.java
@@ -1020,6 +1020,8 @@ public class AccessibilityManagerService extends IAccessibilityManager.Stub
         intentFilter.addAction(Intent.ACTION_USER_REMOVED);
         intentFilter.addAction(Intent.ACTION_SETTING_RESTORED);
 
+        Handler receiverHandler =
+                Flags.managerAvoidReceiverTimeout() ? BackgroundThread.getHandler() : null;
         mContext.registerReceiverAsUser(new BroadcastReceiver() {
             @Override
             public void onReceive(Context context, Intent intent) {
@@ -1061,7 +1063,7 @@ public class AccessibilityManagerService extends IAccessibilityManager.Stub
                     }
                 }
             }
-        }, UserHandle.ALL, intentFilter, null, null);
+        }, UserHandle.ALL, intentFilter, null, receiverHandler);
 
         final IntentFilter filter = new IntentFilter();
         filter.addAction(SafetyCenterManager.ACTION_SAFETY_CENTER_ENABLED_CHANGED);