Reset compat mode settings on settings change.

Test: manual verification
Test: atest CtsAutoFillServiceTestCases:VirtualContainerActivityCompatModeTest

Bug: 73786629

Change-Id: Id77084fe38e75eaedba828d8737e6e465c015400
diff --git a/services/autofill/java/com/android/server/autofill/AutofillManagerService.java b/services/autofill/java/com/android/server/autofill/AutofillManagerService.java
index db62961..05237af 100644
--- a/services/autofill/java/com/android/server/autofill/AutofillManagerService.java
+++ b/services/autofill/java/com/android/server/autofill/AutofillManagerService.java
@@ -524,6 +524,7 @@
 
     private void addCompatibilityModeRequestsLocked(@NonNull AutofillManagerServiceImpl service
             , int userId) {
+        mAutofillCompatState.reset();
         final ArrayMap<String, Pair<Long, String>> compatPackages =
                 service.getCompatibilityPackagesLocked();
         if (compatPackages == null || compatPackages.isEmpty()) {
@@ -626,6 +627,15 @@
                 }
             }
         }
+
+        void reset() {
+            synchronized (mLock) {
+                if (mUserSpecs != null) {
+                    mUserSpecs.clear();
+                    mUserSpecs = null;
+                }
+            }
+        }
     }
 
     final class AutoFillManagerServiceStub extends IAutoFillManager.Stub {
@@ -1045,6 +1055,9 @@
                     Settings.Secure.AUTOFILL_SERVICE), false, this, UserHandle.USER_ALL);
             resolver.registerContentObserver(Settings.Secure.getUriFor(
                     Settings.Secure.USER_SETUP_COMPLETE), false, this, UserHandle.USER_ALL);
+            resolver.registerContentObserver(Settings.Global.getUriFor(
+                    Settings.Global.AUTOFILL_COMPAT_ALLOWED_PACKAGES), false, this,
+                    UserHandle.USER_ALL);
         }
 
         @Override