Fix the page number based Seen impression.

Test: On device.
Bug: 183117427
Change-Id: Ic1b11fb7630f60f11387951749420653aa3f0c8a
diff --git a/src/com/android/launcher3/Launcher.java b/src/com/android/launcher3/Launcher.java
index 578379b..30fe6ca 100644
--- a/src/com/android/launcher3/Launcher.java
+++ b/src/com/android/launcher3/Launcher.java
@@ -1080,7 +1080,13 @@
                 // Making sure mAllAppsSessionLogId is not null to avoid double logging.
                 && mAllAppsSessionLogId != null) {
             getAppsView().getSearchUiManager().resetSearch();
-            getStatsLogManager().logger().log(LAUNCHER_ALLAPPS_EXIT);
+            getStatsLogManager().logger()
+                    .withContainerInfo(LauncherAtom.ContainerInfo.newBuilder()
+                            .setWorkspace(
+                                    LauncherAtom.WorkspaceContainer.newBuilder()
+                                            .setPageIndex(getWorkspace().getCurrentPage()))
+                            .build())
+                    .log(LAUNCHER_ALLAPPS_EXIT);
             mAllAppsSessionLogId = null;
         }
     }