Update git submodules

* Update frameworks/support from branch 'androidx-master-dev'
  to 8b7fe021860c6a19f1b52a41b3e2f8be0e562edb
  - Merge "Minor doc improvements on how to use StableIdKeyProvider..." into androidx-master-dev
  - Minor doc improvements on how to use StableIdKeyProvider...
    And improved documentation on why a developer may NOT want to use this provider.
    Bug: 162324892
    Test: n/a doc only change.
    Change-Id: I60e1c8cfbe61b159ec649f0dad15272c3558287f
1 file changed