Update broken links to udacity classes.
Update broken links to udacity classes.

Change-Id: I353f92834aae93c144f03c60c972f8f08daee7f8

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