[INTERNAL][FIX] sap.m.SuggestionsPopover: onfocusin function corrected
[INTERNAL][FIX] sap.m.SuggestionsPopover: onfocusin function corrected

The input may receive focus when the suggestions popover is instantiated
but the internal _oPopover is still not available.

Change-Id: Ia0e7760a7a8ca3f8a0c15adfdbaf0ddca4524a67
BCP: 1880629222

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