[IoTConnectivity] Set EventContinue as true when ResourceFound/PlatformInformationFound

[IoTConnectivity] Set EventContinue as true when ResourceFound/PlatformInformationFound

 - If there is no default value for EventContinue, then it is set as false.
   In app side(ex, C#TCT), if cb is called and if it doesn't set EventContinue more,
   then it is recognized as false, so next found cb will never be called.
 - So now, fix to set it as true when ResourceFound/PlatformInformationFound.
 - When DeviceInformationFound, it was already set as true.

Signed-off-by: Hongkuk, Son <hongkuk.son@samsung.com>
Change-Id: I3d827c335fea2c95036ca9295e62c4d774001139