Add AnalyticsScreenTimer and track more screens.

Update Analytics with new methods in MXAnalyticsDelegate.

Riot/Modules/Settings/SettingsViewController.m

@@ -283,6 +283,8 @@ TableViewSectionsDelegate>
 @property (nonatomic) BOOL isPreparingIdentityService;
 @property (nonatomic, strong) ServiceTermsModalCoordinatorBridgePresenter *serviceTermsModalCoordinatorBridgePresenter;
 
+@property (nonatomic) AnalyticsScreenTimer *screenTimer;
+
 @end
 
 @implementation SettingsViewController
@@ -315,6 +317,8 @@ TableViewSectionsDelegate>
     isSavingInProgress = NO;
     isResetPwdInProgress = NO;
     is3PIDBindingInProgress = NO;
+    
+    self.screenTimer = [[AnalyticsScreenTimer alloc] initWithScreen:AnalyticsScreenSettings];
 }
 
 - (void)updateSections
@@ -805,6 +809,8 @@ TableViewSectionsDelegate>
     [self releasePushedViewController];
     
     [self.settingsDiscoveryTableViewSection reload];
+    
+    [self.screenTimer start];
 }
 
 - (void)viewWillDisappear:(BOOL)animated
@@ -848,6 +854,12 @@ TableViewSectionsDelegate>
     }
 }
 
+- (void)viewDidDisappear:(BOOL)animated
+{
+    [super viewDidDisappear:animated];
+    [self.screenTimer stop];
+}
+
 #pragma mark - Internal methods
 
 - (void)pushViewController:(UIViewController*)viewController