Sync: Send pixels for account removal + decoding issues (#3557)

Task/Issue URL:
https://app.asana.com/0/1201493110486074/1208723035104886/f
Tech Design URL:
CC:

**Description**:

Adds sync pixels for catching when the keychain read throws a decoding
error and when the account is deleted for various reasons

**Steps to test this PR**:
1. Make sure you've already activated sync.
2. Deactivate sync (either delete the server data or just turn it off)
3. You should see the `sync_account_removed_reason_user-turned-off`
pixel in the console.

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**Definition of Done (Internal Only)**:

* [ ] Does this PR satisfy our [Definition of
Done](https://app.asana.com/0/1202500774821704/1207634633537039/f)?

**Copy Testing**:

* [ ] Use of correct apostrophes in new copy, ie `’` rather than `'`

**Orientation Testing**:

* [ ] Portrait
* [ ] Landscape

**Device Testing**:

* [ ] iPhone SE (1st Gen)
* [ ] iPhone 8
* [ ] iPhone X
* [ ] iPhone 14 Pro
* [ ] iPad

**OS Testing**:

* [ ] iOS 15
* [ ] iOS 16
* [ ] iOS 17

**Theme Testing**:

* [ ] Light theme
* [ ] Dark theme

---
###### Internal references:
[Software Engineering
Expectations](https://app.asana.com/0/59792373528535/199064865822552)
[Technical Design
Template](https://app.asana.com/0/59792373528535/184709971311943)

Core/PixelEvent.swift

@@ -632,6 +632,8 @@ extension Pixel {
         case syncDeleteAccountError
         case syncLoginExistingAccountError
         case syncSecureStorageReadError
+        case syncSecureStorageDecodingError
+        case syncAccountRemoved(reason: String)
 
         case syncGetOtherDevices
         case syncGetOtherDevicesCopy
@@ -1457,6 +1459,8 @@ extension Pixel.Event {
         case .syncDeleteAccountError: return "m_d_sync_delete_account_error"
         case .syncLoginExistingAccountError: return "m_d_sync_login_existing_account_error"
         case .syncSecureStorageReadError: return "m_d_sync_secure_storage_error"
+        case .syncSecureStorageDecodingError: return "sync_secure_storage_decoding_error"
+        case .syncAccountRemoved(let reason): return "sync_account_removed_reason_\(reason)"
 
         case .syncGetOtherDevices: return "sync_get_other_devices"
         case .syncGetOtherDevicesCopy: return "sync_get_other_devices_copy"

Core/SyncErrorHandler.swift

@@ -102,6 +102,10 @@ public class SyncErrorHandler: EventMapping<SyncError> {
                 Pixel.fire(pixel: .syncFailedToSetupEngine, error: error)
             case .failedToReadSecureStore:
                 Pixel.fire(pixel: .syncSecureStorageReadError, error: error)
+            case .failedToDecodeSecureStoreData(let error):
+                Pixel.fire(pixel: .syncSecureStorageDecodingError, error: error)
+            case .accountRemoved(let reason):
+                Pixel.fire(pixel: .syncAccountRemoved(reason: reason.rawValue), error: error)
             default:
                 // Should this be so generic?
                 let domainEvent = Pixel.Event.syncSentUnauthenticatedRequest

DuckDuckGo.xcodeproj/project.pbxproj

@@ -10980,7 +10980,7 @@
 			repositoryURL = "https://github.com/DuckDuckGo/BrowserServicesKit";
 			requirement = {
 				kind = exactVersion;
-				version = 208.0.0;
+				version = 208.1.0;
 			};
 		};
 		9F8FE9472BAE50E50071E372 /* XCRemoteSwiftPackageReference "lottie-spm" */ = {

DuckDuckGo.xcodeproj/project.xcworkspace/xcshareddata/swiftpm/Package.resolved

@@ -32,17 +32,17 @@
       "kind" : "remoteSourceControl",
       "location" : "https://github.com/DuckDuckGo/BrowserServicesKit",
       "state" : {
-        "revision" : "17154907fe86c75942331ed6d037694c666ddd95",
-        "version" : "208.0.0"
+        "revision" : "6be781530a2516c703b8e1bcf0c90e6e763d3300",
+        "version" : "208.1.0"
       }
     },
     {
       "identity" : "content-scope-scripts",
       "kind" : "remoteSourceControl",
       "location" : "https://github.com/duckduckgo/content-scope-scripts",
       "state" : {
-        "revision" : "1733ee59f06f6e725a98cf6cd8322159f59d664b",
-        "version" : "6.31.0"
+        "revision" : "adca39c379b1a124f9990e9d0308c374f32f5018",
+        "version" : "6.32.0"
       }
     },
     {