Update git submodules

* Update frameworks/support from branch 'androidx-master-dev'
  to e7f21c45cbe58b9195a66bb5a811d0d3f82912a8
  - Merge "MediaRouter: Clarify MR2PS#onReleaseSession" into androidx-master-dev
  - MediaRouter: Clarify MR2PS#onReleaseSession
    
    With this CL, Stopping cast session from the output switcher
    will invoke RouteController#onUnselect(UNSELECT_REASON_STOPPED)
    of provider regardless of the client version.
    
    This CL also clarifies the behavior for earlier clients so
    "disabled" routes are notified to the client properly.
    
    Test are revised to check if the route descriptor becomes "enabled"
    after onRouteUnselected callback is invoked as well.
    
    Bug: 163095048
    
    Test: ./gradlew mediarouter:mediarouter:connectedCheck
    with CLIENT_VERSION_CURRENT = CLIENT_VERSION_3 and CLIENT_VERSION_4.
    Also manually checked with support v7 demos omitting MediaTransferReceiver
    to simulate media apps not using MR2 features.
    Also test public media apps with side-loaded GMSCore built with this CL.
    
    Change-Id: Icf27833039eacbb18aadc4d88da97e88582fa094
    
1 file changed