Always set FLAG_SAVE_ON_ALL_VIEWS_INVISIBLE on SaveInfo when on compat mode.

Test: atest CtsAutoFillServiceTestCases:VirtualContainerActivityCompatModeTest

Bug: 76027553

Change-Id: I432b4321801ca90a55a24e5e896578d5b2d63014
diff --git a/core/java/android/service/autofill/AutofillService.java b/core/java/android/service/autofill/AutofillService.java
index 41e4181..94cef60 100644
--- a/core/java/android/service/autofill/AutofillService.java
+++ b/core/java/android/service/autofill/AutofillService.java
@@ -527,6 +527,9 @@
  * <pre> &lt;autofill-service xmlns:android="http://schemas.android.com/apk/res/android"&gt;
  *     &lt;compatibility-package android:name="foo.bar.baz" android:maxLongVersionCode="1000000000"/&gt;
  * &lt;/autofill-service&gt;</pre>
+ *
+ * <p>When using compatibility mode, the {@link SaveInfo.Builder#setFlags(int) SaveInfo flags}
+ * automatically include {@link SaveInfo#FLAG_SAVE_ON_ALL_VIEWS_INVISIBLE}.
  */
 public abstract class AutofillService extends Service {
     private static final String TAG = "AutofillService";
diff --git a/services/autofill/java/com/android/server/autofill/Session.java b/services/autofill/java/com/android/server/autofill/Session.java
index 7f57615..e3fcab9 100644
--- a/services/autofill/java/com/android/server/autofill/Session.java
+++ b/services/autofill/java/com/android/server/autofill/Session.java
@@ -2074,8 +2074,11 @@
             if (saveTriggerId != null) {
                 writeLog(MetricsEvent.AUTOFILL_EXPLICIT_SAVE_TRIGGER_DEFINITION);
             }
-            saveOnAllViewsInvisible =
-                    (saveInfo.getFlags() & SaveInfo.FLAG_SAVE_ON_ALL_VIEWS_INVISIBLE) != 0;
+            int flags = saveInfo.getFlags();
+            if (mCompatMode) {
+                flags |= SaveInfo.FLAG_SAVE_ON_ALL_VIEWS_INVISIBLE;
+            }
+            saveOnAllViewsInvisible = (flags & SaveInfo.FLAG_SAVE_ON_ALL_VIEWS_INVISIBLE) != 0;
 
             // We only need to track views if we want to save once they become invisible.
             if (saveOnAllViewsInvisible) {