[automerge] Do not create seperate thread for prefered network type 2p: 563ddf63b3

Original change: https://googleplex-android-review.googlesource.com/c/platform/packages/services/Telephony/+/17368346

Bug: 21621482
Change-Id: Id8d5d59bb69b56bafc9091fefdf03e25a009c05a