Remove ethernet-service jar dependency.

ethernet service source code is going to be moved into Connectivity
mainline module, and start the ethernet service from the module. The
old ethernet-service lib will be deprecated, remove it from soong
build rule.

Bug: 210586283
Test: m
Change-Id: I8de35246dabba8eb2dda3a154436e43fe19cf384
Merged-In: I19697d13f3809d91c83e37c6d0d403e79eb28664