Support For Uninstallation of Apps via activity

### Please check before submitting an issue

- [X] I have searched the issues and haven't found anything relevant
- [X] I am using the latest version of App Manager
- [X] I have read the docs

### Describe a description of the new feature

AppManager already accepts INSTALL_PACKAGE action
It should accept UNINSTALL_PACKAGE action as well.

The idea behind this to allow AppManager to replace the built-in android PackageInstaller
With AppManager supporting running as System, this seemed like the next step.

I'm available for any testing that my be required

### Describe the solution you'd like

The AppManager to have an Uninstall Activity accepting UNINSTALL_PACKAGE action, without dependence on the built-in packageinstaller app.

### Describe alternatives you've considered

_No response_

### Additional context

activity requirements
- android.intent.action.DELETE
- android.intent.action.UNINSTALL_PACKAGE
- android.intent.category.DEFAULT
- data scheme: package