Solution to Changing Google Password / Account on Android phone
So after few months of cursing at G.... , this worked for me, perfectly
1) Go to, settings, account/sync, choose google, and uncheck all the items so google doesn't sync
2) go to settings, app, choose ALL tab, scroll to GMail and once opened click on CLEAR DATA. It will only remove your google association stuff and nothing else
3) click on FORCE STOP on the same screen
4) go back to settings, account/sync and choose google
5) now you should be able to click REMOVE ACCOUNT . If it doesn't, just reboot your phone and then remove the account.
6) reboot your phone, and then go to settings, account/sync and choose google. Put Nee info and your done!