Refactor ContactListFilterView with CursorLoader

fixes #2240
Refactor ChatPagerAdapter with CursorLoader

fixes #2240
Revert synchronization of methods which cause blocking of UI thread

fixes #2240
Refactor ProviderListItem using AsyncTask

do not perform DB or RPC on UI thread

fixes #2240
Synchronize broadcasting from the contact list manager

fixes #2240
Merge branch 'upstream' into cursor

Conflicts:
	src/info/guardianproject/otr/app/im/app/NewChatActivity.java
AccountAdapter refactored

issue #2240
Switch account lists to CursorLoader

fixes #2240
Put back the account list empty view

issue #2240
Update contact filtering

issue #2240