You can export to Cordova and either build with Android Studio or Cordova CLI. You will be able to make changes to the manifest file.
dop2000, thank you, this is a nice idea! Unfortunately, I do not understand how to make a build in Android Studio and Cordova CLI. At the moment, Android Studio gives an error that does not allow you to create a Debug APK. I'll try to search for information. Thanks.
Another solution is to resize the window in your game when keyboard is open. Check out this thread:
This is a sad option, given that correcting one word in one of the project files completely frees you from the need to scale...
I turned to another Construct community and there I was offered to try to disassemble the Debug APK, make changes to the manifest and then build and sign it in the JDK. And it worked perfectly! Although, the procedure itself is quite painstaking=)
I still hope that Scirra creates a professional product with a lot of features and in the future keyboard settings will become available since I am not the only one who has faced this problem with the android keyboard and people continue to manipulate the proportions to make beautiful projects.
I posted a request to add this feature on the ideas site for Construct 3, I hope it will change something.