Fix readme link typos
Fix readme link typos

Change-Id: I8422028ba00015a21ce4e2d8602558fb201cfc14

gsuitedevs/android-samples,JSergioSette/git-sergio2,KitAway/android-demos,JSergioSette/git-sergio,googleworkspace/android-samples,AzureZhao/android-demos,googledrive/android-demos