Merge \"Merge \\\"docs: Describe how to update N Preview test devices on N...
Merge \"Merge \\\"docs: Describe how to update N Preview test devices on N release\\\" into nyc-dev am: 085b4e8f am: 64e25cf4\" into nyc-mr1-dev-plus-aosp
am: 8ff25378
Change-Id: Ifc8875e97c300ed96df2eab5c61459395ebcec91