Merge "isEthernet() - ARPHRD_PPP does not require ethernet headers" am: 73b42b0f95 am: 3046820011

Original change: https://android-review.googlesource.com/c/platform/packages/modules/Connectivity/+/1897432

Change-Id: I0f1ffa66075256d9829e379279d5e2a917d559e4