Include more error logging for widget restore

Bug: 171774227
Test: manually tested complete backup & restore flow
Change-Id: Ieb4b39d80a24b4dff377ee74d24d9010acd0daca
diff --git a/src/com/android/launcher3/Launcher.java b/src/com/android/launcher3/Launcher.java
index aa123f6..058eca8 100644
--- a/src/com/android/launcher3/Launcher.java
+++ b/src/com/android/launcher3/Launcher.java
@@ -2340,7 +2340,9 @@
             if (item.restoreStatus == LauncherAppWidgetInfo.RESTORE_COMPLETED) {
                 // Verify that we own the widget
                 if (appWidgetInfo == null) {
-                    FileLog.e(TAG, "Removing invalid widget: id=" + item.appWidgetId);
+                    FileLog.e(TAG, "Removing invalid widget: id=" + item.appWidgetId
+                            + ",title=" + item.title
+                            + ",providerName=" + item.providerName.toShortString());
                     getModelWriter().deleteWidgetInfo(item, getAppWidgetHost());
                     return null;
                 }