Merge "isEthernet() - ARPHRD_PPP does not require ethernet headers" am: 73b42b0f95 am: 3046820011 am: ca8500dcc2 am: a4feab485a

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

Change-Id: I34ba0ef58ed21045b144e1243256ac4f12eb7da4