Merge "isEthernet() - ARPHRD_PPP does not require ethernet headers" am: 73b42b0f95 am: 0eeb70a385

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

Change-Id: If92caf8b83c49025b545a304a3bf0ad7f1b6803a