Update git submodules

* Update frameworks/support from branch 'androidx-main'
  to 645651b8dfa244a7c104fd33d6b28168a36dcd6a
  - Merge "publishScan.sh support to upload scan-up-to-date.zip" into androidx-main
  - publishScan.sh support to upload scan-up-to-date.zip
    
    Bug: 207522369
    
    Test: development/publishScan.sh 8282655 androidx_incremental --include-up-to-date # and see that it mentions uploading two build scans
    
    Test: development/publishScan.sh 8282655 androidx_incremental # see that it still works and that it doesn't mention uploading more than one build scan
    
    Change-Id: Id4e4f379cd435a2c9e9d19827293f6a42f869185