[INTERNAL] sap.m.DynamicDateRange: provide hook for custom focus
[INTERNAL] sap.m.DynamicDateRange: provide hook for custom focus

Change-Id: I7fbcbf37f1925c72028e912e7d66b22c069fffa6

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