docs: studio revision 21 update
docs: studio revision 21 update

Change-Id: I61a6fa657aae08760a73816d5ad5536957a3be20

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