docs: update auth doc to mention multiple scopes bug 7644251
docs: update auth doc to mention multiple scopes bug 7644251

Change-Id: I7f0c2e822c306161ae02b11439e5e0095463bcff

xorware/android_frameworks_base,xorware/android_frameworks_base,xorware/android_frameworks_base,xorware/android_frameworks_base,xorware/android_frameworks_base,xorware/android_frameworks_base