Don't show key icon for empty passwords (#2962)

Task/Issue URL:
https://app.asana.com/0/1202926619870900/1207697076491402/f
Tech Design URL:
https://app.asana.com/0/481882893211075/1207750849382981

**Description**:

There has been an issue around for some time where the autofill key icon
(indicating that there is autofill data for that field) was showing in
the password field despite there being no password stored for a domain.
This was because we were using the existence of any stored data for that
domain as the source of truth for showing the icon in both username and
password fields.

**Steps to test this PR**:
1. Go to More (...) -> autofill
2. Make sure there are no other login for the domain https://fill.dev/
3. Add a login for the domain https://fill.dev/, filling in the username
field but not the password field.
4. Visit https://fill.dev/
5. **Observe there is a key icon in the username field but not the
password**
6. Repeat step 1
7. Find the login added in step 3 and add a password.
8. Refresh the https://fill.dev/ page.
9. **Observe there are key icons in both fields**

**Definition of Done**:

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

---
###### Internal references:
[Pull Request Review
Checklist](https://app.asana.com/0/1202500774821704/1203764234894239/f)
[Software Engineering
Expectations](https://app.asana.com/0/59792373528535/199064865822552)
[Technical Design
Template](https://app.asana.com/0/59792373528535/184709971311943)
[Pull Request
Documentation](https://app.asana.com/0/1202500774821704/1204012835277482/f)

DuckDuckGo.xcodeproj/project.pbxproj

@@ -13404,7 +13404,7 @@
 			repositoryURL = "https://github.com/duckduckgo/BrowserServicesKit";
 			requirement = {
 				kind = exactVersion;
-				version = 174.0.1;
+				version = 175.0.0;
 			};
 		};
 		9FF521422BAA8FF300B9819B /* XCRemoteSwiftPackageReference "lottie-spm" */ = {

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

@@ -32,8 +32,8 @@
       "kind" : "remoteSourceControl",
       "location" : "https://github.com/duckduckgo/BrowserServicesKit",
       "state" : {
-        "revision" : "63195a30b02e05d1b7176c76ebc55c2cff66c9c8",
-        "version" : "174.0.1"
+        "revision" : "b2f5a7159088ff5c4fd2eeaa4dcf5c001fc8f7fb",
+        "version" : "175.0.0"
       }
     },
     {
@@ -75,7 +75,7 @@
     {
       "identity" : "lottie-spm",
       "kind" : "remoteSourceControl",
-      "location" : "https://github.com/airbnb/lottie-spm",
+      "location" : "https://github.com/airbnb/lottie-spm.git",
       "state" : {
         "revision" : "1d29eccc24cc8b75bff9f6804155112c0ffc9605",
         "version" : "4.4.3"

LocalPackages/DataBrokerProtection/Package.swift

@@ -29,7 +29,7 @@ let package = Package(
             targets: ["DataBrokerProtection"])
     ],
     dependencies: [
-        .package(url: "https://github.com/duckduckgo/BrowserServicesKit", exact: "174.0.1"),
+        .package(url: "https://github.com/duckduckgo/BrowserServicesKit", exact: "175.0.0"),
         .package(path: "../SwiftUIExtensions"),
         .package(path: "../XPCHelper"),
     ],

LocalPackages/NetworkProtectionMac/Package.swift

@@ -32,7 +32,7 @@ let package = Package(
         .library(name: "VPNAppLauncher", targets: ["VPNAppLauncher"]),
     ],
     dependencies: [
-        .package(url: "https://github.com/duckduckgo/BrowserServicesKit", exact: "174.0.1"),
+        .package(url: "https://github.com/duckduckgo/BrowserServicesKit", exact: "175.0.0"),
         .package(url: "https://github.com/airbnb/lottie-spm", exact: "4.4.3"),
         .package(path: "../AppLauncher"),
         .package(path: "../UDSHelper"),

LocalPackages/SubscriptionUI/Package.swift

@@ -12,7 +12,7 @@ let package = Package(
             targets: ["SubscriptionUI"]),
     ],
     dependencies: [
-        .package(url: "https://github.com/duckduckgo/BrowserServicesKit", exact: "174.0.1"),
+        .package(url: "https://github.com/duckduckgo/BrowserServicesKit", exact: "175.0.0"),
         .package(path: "../SwiftUIExtensions")
     ],
     targets: [

UnitTests/DataExport/MockSecureVault.swift

@@ -36,6 +36,7 @@ let MockSecureVaultFactory = SecureVaultFactory<MockSecureVault>(
 )
 
 final class MockSecureVault<T: AutofillDatabaseProvider>: AutofillSecureVault {
+
     enum MockError: Error {
         case noStubSet
     }
@@ -53,6 +54,7 @@ final class MockSecureVault<T: AutofillDatabaseProvider>: AutofillSecureVault {
 
     var storedAccounts: [SecureVaultModels.WebsiteAccount] = []
     var storedCredentials: [Int64: SecureVaultModels.WebsiteCredentials] = [:]
+    var storedCredentialsForDomain: [String: [SecureVaultModels.WebsiteCredentials]] = [:]
     var storedNeverPromptWebsites = [SecureVaultModels.NeverPromptWebsites]()
     var storedNotes: [SecureVaultModels.Note] = []
     var storedIdentities: [SecureVaultModels.Identity] = []
@@ -90,6 +92,14 @@ final class MockSecureVault<T: AutofillDatabaseProvider>: AutofillSecureVault {
         return storedCredentials[accountId]
     }
 
+    func websiteCredentialsFor(domain: String) throws -> [BrowserServicesKit.SecureVaultModels.WebsiteCredentials] {
+        return storedCredentialsForDomain[domain] ?? []
+    }
+
+    func websiteCredentialsWithPartialMatchesFor(eTLDplus1: String) throws -> [BrowserServicesKit.SecureVaultModels.WebsiteCredentials] {
+        return storedCredentialsForDomain[eTLDplus1] ?? []
+    }
+
     func storeWebsiteCredentials(_ credentials: SecureVaultModels.WebsiteCredentials) throws -> Int64 {
         let accountID = Int64(credentials.account.id!)!
         storedCredentials[accountID] = credentials
@@ -302,6 +312,7 @@ class MockDatabaseProvider: AutofillDatabaseProvider {
     var _creditCards = [Int64: SecureVaultModels.CreditCard]()
     var _forDomain = [String]()
     var _credentialsDict = [Int64: SecureVaultModels.WebsiteCredentials]()
+    var _credentialsForDomain = [String: [SecureVaultModels.WebsiteCredentials]]()
     var _note: SecureVaultModels.Note?
     var _neverPromptWebsites = [SecureVaultModels.NeverPromptWebsites]()
 
@@ -330,6 +341,14 @@ class MockDatabaseProvider: AutofillDatabaseProvider {
         return _credentialsDict[accountId]
     }
 
+    func websiteCredentialsForDomain(_ domain: String) throws -> [BrowserServicesKit.SecureVaultModels.WebsiteCredentials] {
+        return _credentialsForDomain[domain] ?? []
+    }
+
+    func websiteCredentialsForTopLevelDomain(_ domain: String) throws -> [BrowserServicesKit.SecureVaultModels.WebsiteCredentials] {
+        return _credentialsForDomain[domain] ?? []
+    }
+
     func websiteAccountsForDomain(_ domain: String) throws -> [SecureVaultModels.WebsiteAccount] {
         self._forDomain.append(domain)
         return _accounts