add Spinel SPI interface support am: 7ae6d6f4 am: 7e9e8e97 am: 0191fa36...

add Spinel SPI interface support am: 7ae6d6f4 am: 7e9e8e97 am: 0191fa36 am: 9c6ef309 am: 3eabe6b5 am: a9f62f2f

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



Change-Id: Idd6f8b778b4078f615592e22c178ecb63502a273
Signed-off-by: Automerger Merge Worker <android-build-automerger-merge-worker@system.gserviceaccount.com>