Handle Matrix User presence as following:

- set Online when app is active.
- set Unavailable when app is suspended (inactive).
- set Offline when user logs out the app (this option is currently commented because the user is kept offline when he logs in again from web client).

Multidevice handling: the app compares the presence from server with the local value in order to keep the most pertinent.

matrixConsole/MatrixHandler.h

@@ -36,6 +36,7 @@ extern NSString *const kMatrixHandlerUnsupportedMessagePrefix;
 // Matrix user's settings
 @property (strong, nonatomic) NSString *userDisplayName;
 @property (strong, nonatomic) NSString *userPictureURL;
+@property (nonatomic) MXPresence userPresence;
 
 @property (nonatomic,readonly) BOOL isLogged;
 @property (nonatomic,readonly) BOOL isInitialSyncDone;
@@ -43,7 +44,7 @@ extern NSString *const kMatrixHandlerUnsupportedMessagePrefix;
 
 + (MatrixHandler *)sharedHandler;
 
-- (void)pause;
+- (void)pauseInBackgroundTask;
 - (void)resume;
 - (void)logout;