Ionic Android9 and SDK 28 upgration failed from old version android6.3

We build the ionic app with android version 6.3 and sdk 26, ionic 2.2.1. we are trying to upgrade android version 9 and sdk28 for latest play store policy, we are getting error like manifest files missed

but manifest file is there inside app directory, before that manifest file was created inside platform/android/manifest like that

Now for SDK28 platform/android/app/manifest like that it’s there it’s giving error like manifest undefined

Let me help on this