Replacing IIpClient with Manager in ethNetFactory am: d8118aec3f am: d8b1f59105

Original change: https://android-review.googlesource.com/c/platform/frameworks/opt/net/ethernet/+/1935877

Change-Id: I0025ce5333ef9ed56fc4a58d560c80493ab99786
tree: 086c6ae2487ac66151330989710185bb07933406
  1. service-t/
  2. tests/