Use sp<T>::make to create the sp pointer for EventLoopCallback am: 77798e915c

Original change: https://googleplex-android-review.googlesource.com/c/platform/system/connectivity/wificond/+/20330542

Change-Id: Iac8d60458613ab060738242cfd31e1376736d7de
Signed-off-by: Automerger Merge Worker <android-build-automerger-merge-worker@system.gserviceaccount.com>