[RFCLAT#11] remove libnetd_client_headers and netid_client.h am: 935a5ee67c am: 45feb24fd7

Original change: https://android-review.googlesource.com/c/platform/external/android-clat/+/1925759

Change-Id: If02a4b16105a142638ca9418bd0f7b95ebb75dc3