fix: Add metric trait for privacy mode

Author: darkwing

app/scripts/controllers/metametrics-controller.test.ts

@@ -1453,6 +1453,7 @@ describe('MetaMetricsController', function () {
           participateInMetaMetrics: true,
           currentCurrency: 'usd',
           dataCollectionForMarketing: false,
+          preferences: { privacyMode: true },
           ///: BEGIN:ONLY_INCLUDE_IF(build-mmi)
           custodyAccountDetails: {},
           ///: END:ONLY_INCLUDE_IF
@@ -1541,6 +1542,7 @@ describe('MetaMetricsController', function () {
           allNfts: {},
           participateInMetaMetrics: true,
           dataCollectionForMarketing: false,
+          preferences: { privacyMode: true },
           securityAlertsEnabled: true,
           names: {
             ethereumAddress: {},
@@ -1604,6 +1606,7 @@ describe('MetaMetricsController', function () {
           allNfts: {},
           participateInMetaMetrics: true,
           dataCollectionForMarketing: false,
+          preferences: { privacyMode: true },
           securityAlertsEnabled: true,
           ///: BEGIN:ONLY_INCLUDE_IF(build-mmi)
           custodyAccountDetails: {},
@@ -1668,6 +1671,7 @@ describe('MetaMetricsController', function () {
           },
           participateInMetaMetrics: true,
           dataCollectionForMarketing: false,
+          preferences: { privacyMode: true },
           securityAlertsEnabled: true,
           security_providers: ['blockaid'],
           currentCurrency: 'usd',
@@ -1713,6 +1717,7 @@ describe('MetaMetricsController', function () {
           allNfts: {},
           participateInMetaMetrics: true,
           dataCollectionForMarketing: false,
+          preferences: { privacyMode: true },
           names: {
             ethereumAddress: {},
           },

app/scripts/controllers/metametrics-controller.ts

@@ -164,6 +164,9 @@ export type MetaMaskState = {
   security_providers: string[];
   addressBook: AddressBookControllerState['addressBook'];
   currentCurrency: string;
+  preferences: {
+    privacyMode: PreferencesControllerState['preferences']['privacyMode'];
+  };
   ///: BEGIN:ONLY_INCLUDE_IF(build-mmi)
   custodyAccountDetails: {
     [address: string]: {
@@ -1228,6 +1231,8 @@ export default class MetaMetricsController extends BaseController<
         metamaskState.dataCollectionForMarketing,
       [MetaMetricsUserTrait.TokenSortPreference]:
         metamaskState.tokenSortConfig?.key || '',
+      [MetaMetricsUserTrait.PrivacyModeEnabled]:
+        metamaskState.preferences.privacyMode,
     };
 
     if (!previousUserTraits) {

shared/constants/metametrics.ts

@@ -590,6 +590,10 @@ export enum MetaMetricsUserTrait {
    * Identified when the user changes token sort order on asset-list
    */
   TokenSortPreference = 'token_sort_preference',
+  /**
+   * Identifies if the Privacy Mode is enabled
+   */
+  PrivacyModeEnabled = 'privacy_mode_toggle',
 }
 
 /**