Add SAFE_ARC_RETAINs for ADAcquireTokenSilentHandler properties.
Add SAFE_ARC_RETAINs for ADAcquireTokenSilentHandler properties.

msintuneappsdk/azure-activedirectory-library-for-objc,msftberlin/azure-activedirectory-library-for-objc,AzureAD/azure-activedirectory-library-for-objc,AzureAD/azure-activedirectory-library-for-objc,AzureAD/azure-activedirectory-library-for-objc,AzureAD/azure-activedirectory-library-for-objc,msftberlin/azure-activedirectory-library-for-objc,AzureAD/azure-activedirectory-library-for-objc,msintuneappsdk/azure-activedirectory-library-for-objc