Option to rename only applicationId while keeping package name.

[MikuAuahDark]

Is your feature request related to a problem? Please describe.
In newer Android, "package name" and "applicationId" are no longer interchangeable. However in APKTool 2.7.0, changing the package in AndroidManifest.xml (or specifying renameManifestPackage in apktool.yml) changes both, and without proper checking through the smali files, will result in app fails to launch because it looks for wrong R classes.

Describe the solution you'd like
Option in apktool.yml to specify the new applicationId or command-line option to override the applicationId. This will keep "package name" intact but changes the applicationId alone.

Additional context
https://developer.android.com/studio/build/configure-app-module

Note: The application ID used to be directly tied to your code's package name, so some Android APIs use the term "package name" in their method names and parameter names. This is actually your application ID. For example, the Context.getPackageName() method returns your application ID. There's never a need to share your code's true package name outside your app code.

Quick look at AAPT2, it seems possible with --rename-resources-package.

[iBotPeaches]

Seems like a sane request. Added label.