[INTERNAL] sap.m.List: Growing accessibility improvements.
[INTERNAL] sap.m.List: Growing accessibility improvements.

- Growing button text changes must be announced.

Change-Id: I2bcd27c8740f545a5b62cfd388ca5959709151f3

nzamani/openui5,SAP/openui5,olirogers/openui5,SQCLabs/openui5,olirogers/openui5,cschuff/openui5,SQCLabs/openui5,olirogers/openui5,SAP/openui5,SQCLabs/openui5,nzamani/openui5,cschuff/openui5,SAP/openui5,cschuff/openui5,nzamani/openui5,SAP/openui5