Merge "docs: Add deprecation message for the developer.android.com docs am: b9bd6cca9e am: 045ae0458a am: e161f75d38 am: 536dc4ecc4 am: 206d947de9" into nyc-mr2-dev-plus-aosp
am: 21014b81be

Change-Id: Ia637bcffda2a41783c305497d60de479f1c98a3a