There were two places where account flags were being set on setup: one
was in manual setup when the user selected the account type
(pop/imap/eas), and another was when it was automatically determined
from XML. The two paths were inconsistent and one was setting bits like
SUPPORTS_SEARCH but the other wasn't.
This fixes being able to search in IMAP
Bug: 5011932
Change-Id: I50eada7485aaef4e2a85d25fa7eb9ac7ab03093a