update android step for facebook plugin
update android step for facebook plugin

yinjimmy/en,sdkbox-staging/en,yinjimmy/en,sdkbox-doc/en,sdkbox-doc/en,yinjimmy/en,sdkbox-staging/en,soomla/en,soomla/en,sdkbox-staging/en,sdkbox-staging/en,sdkbox-doc/en,soomla/en,soomla/en,yinjimmy/en,sdkbox-doc/en