[Android] Stub for account management screen.

BUG=316637

Review URL: https://codereview.chromium.org/132033005

git-svn-id: svn://svn.chromium.org/chrome/trunk/src@245631 0039d316-1c4b-4281-b951-d872f2087c98
SVN changes up to revision 245631
Remove unused code  (gaia_oauth_fetcher).
The oauth2 apis are handled by google_apis\gaia\gaia_oauth_client.

BUG=None

Review URL: https://codereview.chromium.org/139153011

git-svn-id: svn://svn.chromium.org/chrome/trunk/src@245632 0039d316-1c4b-4281-b951-d872f2087c98
SVN changes up to revision 245632