Update content restrictions docs.
Update content restrictions docs.

Change-Id: I103a7b6005420c41fabc9b622efe3b546957f691

shaka-project/shaka-player,baconz/shaka-player,shaka-project/shaka-player,vimond/shaka-player,baconz/shaka-player,treejames/shaka-player,op1ekun/shaka-player,tvoli/shaka-player,viniciusferreira/shaka-player,TobbeEdgeware/shaka-player,palmerj3/shaka-player,ustudio/shaka-player,intfrr/shaka-player,Afrostream/shaka-player,viniciusferreira/shaka-player,samdutton/shaka-player,ustudio/shaka-player,UIKit0/shaka-player,op1ekun/shaka-player,cmgrecu/shaka-player,op1ekun/shaka-player,indiereign/shaka-player,brightcove/shaka-player,UIKit0/shaka-player,cmgrecu/shaka-player,blinkbox/shaka-player,op1ekun/shaka-player,vimond/shaka-player,Afrostream/shaka-player,blinkbox/shaka-player,vpopolitov/shaka-player,vpopolitov/shaka-player,viniciusferreira/shaka-player,russitto/shaka-player,Ross-cz/shaka-player,treejames/shaka-player,baconz/shaka-player,samdutton/shaka-player,indiereign/shaka-player,priyajeet/shaka-player,shaka-project/shaka-player,indiereign/shaka-player,tvoli/shaka-player,samdutton/shaka-player,russitto/shaka-player,viniciusferreira/shaka-player,cmgrecu/shaka-player,intfrr/shaka-player,sanbornhnewyyz/shaka-player,vimond/shaka-player,brightcove/shaka-player,tvoli/shaka-player,rodrigoramos/shaka-player,UIKit0/shaka-player,rodrigoramos/shaka-player,tvoli/shaka-player,Afrostream/shaka-player,blinkbox/shaka-player,samdutton/shaka-player,intfrr/shaka-player,TobbeEdgeware/shaka-player,Ross-cz/shaka-player,ustudio/shaka-player,vpopolitov/shaka-player,shaka-project/shaka-player,TheModMaker/shaka-player,sanbornhnewyyz/shaka-player,TobbeEdgeware/shaka-player,rodrigoramos/shaka-player,priyajeet/shaka-player,sanbornhnewyyz/shaka-player,sanbornhnewyyz/shaka-player,blinkbox/shaka-player,brightcove/shaka-player,rodrigoramos/shaka-player,TheModMaker/shaka-player,treejames/shaka-player,UIKit0/shaka-player,russitto/shaka-player,TheModMaker/shaka-player,priyajeet/shaka-player,Ross-cz/shaka-player,treejames/shaka-player,palmerj3/shaka-player,priyajeet/shaka-player,palmerj3/shaka-player,ustudio/shaka-player,TheModMaker/shaka-player,intfrr/shaka-player,palmerj3/shaka-player,Afrostream/shaka-player,vpopolitov/shaka-player