[INTERNAL] sap.f.shellBar.ResponsiveHandler: JSDoc added and minor fixes
[INTERNAL] sap.f.shellBar.ResponsiveHandler: JSDoc added and minor fixes

Change-Id: Ice838199f179aac0a8d1f49a5372ab04c173f651

SAP/openui5,SAP/openui5,SAP/openui5,SAP/openui5