Display the dependency info for the vscode-java default project

[testforstephen]

It's better to show the dependency info for the default project.

[andxu]

Will show the default when the language server side finishes

[akaroml]

our plan is to get rid of the default project. so let's hold this.

[yaohaizh]

Revisit this issue since we already have invisible project supports.
Decision should be made:

1. Not support dependency for default project & invisible projects.
2. Support dependency for default project & invisible projects.

[jdneo]

Current behavior:

Invisible project is supported.
Default project is not supported.