Account: Add new abstract method getDisplayName. Also add stub implementation for FacebookAccount.
AccountManager: Add new method getAccountList to return list of accounts
AccountManager: Make accountList final
AccountManager: Make availableAccountTypes final
Create new class AccountListAdapter - ListAdapter implementation used for displaying list of accounts
AccountsActivity: Use AccountListAdapter as adapter for the accounts_list element
AccountManager: Add exta notes for TODO
NewAccountTypeSelectActivity: Add TODO for AccountTypeListAdapter object creation
Have AccountManager return the list of accounts as a List, and modify AccountListAdapter to expect the same
AccountsActivity: Correct TODO comment
AccountsActivity: Make reference to the accounts_list ListView a variable, so that it can be used in onResume as well
AccountsActivity: Create field accountListView to hold reference to accounts_list View
AccountsActivity: Override onResume method, redraw account list on
activity resume