Request: offer more options for drag&drop of files

When right-button drag&drop, it could offer us various options:
1. push to main storage path (important for APK files, as the normal behavior is to install them)
2. push to Download folder
3. For single APK file, install&run.
4. Same as #3, but also grant permissions (use the "-g" parameter)
5. For multiple APK files, install&grant-permissions
6. Push and share
7. Push and open

As for the definition of "run", it depends. On most apps, it's the main Activity to launch.
On some, there is no such an Activity. On such cases, it depends on what is the app. If for example, it's a live wallpaper app, it should show the chooser. If it failed to find how to "run" the app, nothing should occur, except maybe tell the user that we can't find any way to "run" the app.