Eleven: Add two sliding panels to the player

Eleven: Add two sliding panels to the player

This does most of the work to change the player activity to a fragment
and integrate the sliding panel logic.  Since this is a pretty large change
I'll be checking this piece in first and then continue to hook up the remaining pieces

Change-Id: Ibc8ee392a939a4a965a3164558ccf075b4d35567