[PM-22419] dismiss account nudge when biometric unlock is set (#15139)

* update account-security-nudge service to look at biomentricUnlockEnabled$ observable, add success toast for biometric unlock

apps/browser/src/_locales/en/messages.json

@@ -5062,6 +5062,9 @@
   "unlockPinSet": {
     "message": "Unlock PIN set"
   },
+  "unlockBiometricSet": {
+    "message": "Unlock biometrics set"
+  },
   "authenticating": {
     "message": "Authenticating"
   },

apps/browser/src/auth/popup/settings/account-security.component.ts

@@ -534,6 +534,11 @@ export class AccountSecurityComponent implements OnInit, OnDestroy {
         if (!successful) {
           await this.biometricStateService.setFingerprintValidated(false);
         }
+        this.toastService.showToast({
+          variant: "success",
+          title: null,
+          message: this.i18nService.t("unlockBiometricSet"),
+        });
       } catch (error) {
         this.form.controls.biometric.setValue(false);
         this.validationService.showError(error);