Merge "isEthernet() - ARPHRD_PPP does not require ethernet headers" am: 73b42b0f95 am: 3046820011 am: ca8500dcc2

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

Change-Id: I433ad51a05dbb11c61a63c4a4474e7b85d0171ec