[Payments] Set cached manifest expiration date

components/payments/android/web_app_manifest_section_table.h

Index: components/payments/android/web_app_manifest_section_table.h
diff --git a/components/payments/android/web_app_manifest_section_table.h b/components/payments/android/web_app_manifest_section_table.h
index 12322e715c4dbef93dc19f46abfd603eb1562420..09525da900db2f46c418d18c11583cb06692c119 100644
--- a/components/payments/android/web_app_manifest_section_table.h
+++ b/components/payments/android/web_app_manifest_section_table.h
@@ -21,6 +21,7 @@ namespace payments {
 // web_app_manifest_section The table stores the contents in
 //                          WebAppManifestSection.
 //
+//  expire_date             The data expire date in seconds.
 //  id                      The package name of the app.
 //  min_version             Minimum version number of the app.
 //  fingerprints            The result of SHA256(signing certificate bytes) for