Actually clear file names from intent

Rather than setting module-level `isClear` boolean, which would only allow the app to receive & respond to one share.

This change prevents the issue on Android of the app 1) receives a share intent, 2) user then opens photo picker, causing app to go to bg and back to fg, 3) triggers share sheet to reopen, because original share intent info has not been properly cleared

ajith-ab/react-native-receive-sharing-intent#110 (comment)

Author: mackenziekira

src/ReceiveSharingIntent.ts

@@ -33,7 +33,7 @@ class ReceiveSharingIntentModule implements IReceiveSharingIntent {
     }
 
     clearReceivedFiles(){
-        this.isClear = true;
+        ReceiveSharingIntent.clearFileNames();
     }
 
 
@@ -54,4 +54,4 @@ class ReceiveSharingIntentModule implements IReceiveSharingIntent {
 
 }
 
-export default ReceiveSharingIntentModule;
+export default ReceiveSharingIntentModule;