storageheler refactor: address comments
storageheler refactor: address comments

iambmelt/azure-activedirectory-library-for-android,thewulf7/adal-extended,AzureAD/azure-activedirectory-library-for-android,iambmelt/azure-activedirectory-library-for-android,thewulf7/adal-extended,AzureAD/azure-activedirectory-library-for-android