Cannot run the sample as an instant app

[AlecKazakova]

Steps to reproduce:

1. Add <dist:module dist:instant="true"/> to sample/app/main/AndroidManifest.xml
2. Change the run configuration for the sample app to "Deploy as an Instant App" and run

This then gives a configuration error for each dynamic feature module:

1: Task failed with an exception.
-----------
* What went wrong:
A problem was found with the configuration of task ':bigboxfeature:processDebugAndroidTestResources' (type 'LinkApplicationAndroidResourcesTask').
  - In plugin 'com.android.internal.version-check' type 'com.android.build.gradle.internal.res.LinkApplicationAndroidResourcesTask' property 'manifestFiles' doesn't have a configured value.
    
    Reason: This property isn't marked as optional and no value has been configured.
    
    Possible solutions:
      1. Assign a value to 'manifestFiles'.
      2. Mark property 'manifestFiles' as optional.
    
    For more information, please refer to https://docs.gradle.org/8.2/userguide/validation_problems.html#value_not_set in the Gradle documentation.

I'm not actually sure this is related to BDF yet, but I'm able to do a pretty standard instant app build which fails if I apply BDF and all its related thing (ie this might be like a KSP issue)

I attempted to resolve by manually setting the manifestFiles property for LinkApplicationAndroidResourcesTask here

I also tried monkeypatching that task to make the property optional but it had so many internal references I got like 20 files of copying deep and decided it was probably not a workable solution

Even if this isn't a BDF issue, would be nice to fix it with BDF if we can