Change OpenWRT's DHCP lease time to 2m am: 66676e274a am: e548975820

Original change: https://android-review.googlesource.com/c/platform/external/openwrt-prebuilts/+/2746573

Change-Id: I9b0ae736e1eb3bf5985b8200020912f41824a68b
Signed-off-by: Automerger Merge Worker <android-build-automerger-merge-worker@system.gserviceaccount.com>