Instrument missing screen metrics (#5764)

* Instrument missing screen metrics

- Done

Riot/Modules/Settings/Security/SecurityViewController.m

@@ -119,7 +119,7 @@ TableViewSectionsDelegate>
 @property (nonatomic, strong) SetPinCoordinatorBridgePresenter *setPinCoordinatorBridgePresenter;
 @property (nonatomic, strong) CrossSigningSetupCoordinatorBridgePresenter *crossSigningSetupCoordinatorBridgePresenter;
 
-@property (nonatomic) AnalyticsScreenTimer *screenTimer;
+@property (nonatomic) AnalyticsScreenTracker *screenTracker;
 
 @end
 
@@ -145,7 +145,7 @@ TableViewSectionsDelegate>
     self.enableBarTintColorStatusChange = NO;
     self.rageShakeManager = [RageShakeManager sharedManager];
     
-    self.screenTimer = [[AnalyticsScreenTimer alloc] initWithScreen:AnalyticsScreenSettingsSecurity];
+    self.screenTracker = [[AnalyticsScreenTracker alloc] initWithScreen:AnalyticsScreenSettingsSecurity];
 }
 
 - (void)viewDidLoad
@@ -254,6 +254,8 @@ TableViewSectionsDelegate>
 {
     [super viewWillAppear:animated];
 
+    [self.screenTracker trackScreen];
+
     // Release the potential pushed view controller
     [self releasePushedViewController];
 
@@ -269,12 +271,6 @@ TableViewSectionsDelegate>
     [self loadCrossSigning];
 }
 
-- (void)viewDidAppear:(BOOL)animated
-{
-    [super viewDidAppear:animated];
-    [self.screenTimer start];
-}
-
 - (void)viewWillDisappear:(BOOL)animated
 {
     [super viewWillDisappear:animated];
@@ -286,12 +282,6 @@ TableViewSectionsDelegate>
     }
 }
 
-- (void)viewDidDisappear:(BOOL)animated
-{
-    [super viewDidDisappear:animated];
-    [self.screenTimer stop];
-}
-
 #pragma mark - Internal methods
 
 - (void)updateSections