fix: error when building paper after fabric (software-mansion#2142)

## Description

Currently when you build Fabric app and then Paper app Android Studio
has errors about duplicated classes. This should resolve that issue.

**Test:**
Packed with `npm pack` and tested on new expo app. Seems that everything
is fine.

android/build.gradle

@@ -152,7 +152,6 @@ android {
             } else {
                 srcDirs += [
                     "src/paper/java",
-                    "build/generated/source/codegen/java"
                 ]
             }
         }