Update git submodules

* Update frameworks/support from branch 'androidx-master-dev'
  to 6ecbb645f1beb2544c520ce788a32eb03487836e
  - Merge "ViewGroup.setContent => [Abstract]ComposeView" into androidx-master-dev
  - ViewGroup.setContent => [Abstract]ComposeView
    
    Migrate usages of ViewGroup.setContent to [Abstract]ComposeView and
    improve the latter's API surface.
    
    Start paving the way for removing Recomposer.current() and relying on
    window-scoped Recomposers.
    
    Relnote: "Expand [Abstract]ComposeView APIs to allow recycling
    Compose-based views, disposing their composition to recreate again
    later. Add APIs for installing and discovering window-scoped Recomposers
    and CompositionReferences for creating child compositions.
    
    Add ViewCompositionStrategy for configuring the composition disposal
    strategy of [Abstract]ComposeViews; default behavior is dispose on
    window detach."
    
    Test: ComposeViewTest.kt
    
    Change-Id: I860ab99a2950457157a4d904e0c514d5134fdfd7
    
diff --git a/frameworks/support b/frameworks/support
index b2b7c75..6ecbb64 160000
--- a/frameworks/support
+++ b/frameworks/support
@@ -1 +1 @@
-Subproject commit b2b7c75b936a27cc68e38cba49a726fb592ca75f
+Subproject commit 6ecbb645f1beb2544c520ce788a32eb03487836e