Change OpenWRT's DHCP lease time to 2m am: 66676e274a am: e548975820 am: 63dbb13ebc am: 0cf6d39d56

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

Change-Id: Ifd007e74f74fc8146016696478702e865bbeaea9
Signed-off-by: Automerger Merge Worker <android-build-automerger-merge-worker@system.gserviceaccount.com>