add Spinel SPI interface support am: 7ae6d6f4ff am: 7e9e8e975c am: 0191fa36cf am: 9c6ef30970 am: 3eabe6b5b9

Original change: https://android-review.googlesource.com/c/platform/hardware/interfaces/+/2648140

Change-Id: I51fd49b5f3b992599f215e4e3cabd341ddbdcf65
Signed-off-by: Automerger Merge Worker <android-build-automerger-merge-worker@system.gserviceaccount.com>