Update git submodules
Update git submodules

* Update plugins/gitiles from branch 'master'
  to a33c8b8d61b778f8ca84196b1a7cc1fd4fe24946
  - Fix error handling when project state is empty
    
    Before this change, an unexpected exception
    java.util.NoSuchElementException was thrown when the project state is
    empty, then Resolver could not handle this exception and this causes
    a Server Error. To fix this issue, a present check was added
    before the project state check.
    
    Bug: Issue 13492
    Change-Id: I40a128bba8a0794b7daeb019ef0f75cefedef342
    
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