[RFCLAT#2] Move the packet socket creation from clatd to netd am: 06367f3870 am: 9ed943c790 am: 3e577a0e08

Original change: https://android-review.googlesource.com/c/platform/external/android-clat/+/1903034

Change-Id: I65061e0e38c58b1f99bafdef787dce6401d61a43