Update git submodules

* Update frameworks/support from branch 'androidx-main'
  to 82e50542fccd2ddd062324d5565624169486c618
  - Merge "[WebView] Unhide WebViewCompat.getVariationsHeader() API" into androidx-main
  - [WebView] Unhide WebViewCompat.getVariationsHeader() API
    
    Bug: 221496111
    Test: ./gradlew webkit:webkit:lintDebug
    Test: ./gradlew webkit:webkit:assembleDebug
    Test: ./gradlew webkit:webkit:connectedCheck
    Test: ./gradlew webkit:webkit:generateApi
    Test: ./gradlew webkit:webkit:updateApi
    Change-Id: I5152d9225ca927dbfe3a089d3b6f3abab363207a