[automerge] Use the default refresh interval if SES doesn't provide it. 2p: a3f1109499

Original change: https://googleplex-android-review.googlesource.com/c/platform/packages/modules/Wifi/+/22461742

Bug: 276915230
Change-Id: I1e6174b912f6b8b528d5574b0379c2567eb3e41c
Merged-In: I485d8ccce2a98a5e0d7df007032aae558d36439a