150200 Release

GDPR methods & addListenerForNotificationOpened Fix

• Added GDPR privacy consent to postpone initialization of the SDK until the user accepts
  • New requiresUserPrivacyConsent init flag
  • New provideUserConsent(boolean) function
• Fixed getListeners error when opening a notification if addListenerForNotificationOpened was called
  • Issue #344
• Added Promise of id to setEmail. PR #349