Stack filter should collapse tree walks #4174
Description
This kind of thing:
I/flutter : #6 MultiChildRenderObjectElement.mount (package:flutter/src/widgets/framework.dart)
I/flutter : #7 Element.inflateWidget (package:flutter/src/widgets/framework.dart)
I/flutter : #8 Element.updateChild (package:flutter/src/widgets/framework.dart)
I/flutter : #9 ComponentElement.performRebuild (package:flutter/src/widgets/framework.dart)
I/flutter : #10 ComponentElement.mount (package:flutter/src/widgets/framework.dart)
I/flutter : #11 Element.inflateWidget (package:flutter/src/widgets/framework.dart)
I/flutter : #12 Element.updateChild (package:flutter/src/widgets/framework.dart)
I/flutter : #13 ComponentElement.performRebuild (package:flutter/src/widgets/framework.dart)
I/flutter : #14 StatefulElement._firstBuild (package:flutter/src/widgets/framework.dart)
I/flutter : #15 ComponentElement.mount (package:flutter/src/widgets/framework.dart)
I/flutter : #16 SingleChildRenderObjectElement.mount (package:flutter/src/widgets/framework.dart)
I/flutter : #17 Element.inflateWidget (package:flutter/src/widgets/framework.dart)
I/flutter : #18 Element.updateChild (package:flutter/src/widgets/framework.dart)
I/flutter : #19 ComponentElement.performRebuild (package:flutter/src/widgets/framework.dart)
I/flutter : #20 ComponentElement.mount (package:flutter/src/widgets/framework.dart)
I/flutter : #21 SingleChildRenderObjectElement.mount (package:flutter/src/widgets/framework.dart)
I/flutter : #22 SingleChildRenderObjectElement.mount (package:flutter/src/widgets/framework.dart)
I/flutter : #23 Element.inflateWidget (package:flutter/src/widgets/framework.dart)
I/flutter : #24 Element.updateChild (package:flutter/src/widgets/framework.dart)
I/flutter : #25 ComponentElement.performRebuild (package:flutter/src/widgets/framework.dart)
I/flutter : #26 ComponentElement.mount (package:flutter/src/widgets/framework.dart)
I/flutter : #27 SingleChildRenderObjectElement.mount (package:flutter/src/widgets/framework.dart)
I/flutter : #28 Element.inflateWidget (package:flutter/src/widgets/framework.dart)
I/flutter : #29 Element.updateChild (package:flutter/src/widgets/framework.dart)
I/flutter : #30 ComponentElement.performRebuild (package:flutter/src/widgets/framework.dart)
I/flutter : #31 ComponentElement.mount (package:flutter/src/widgets/framework.dart)
I/flutter : #32 Element.inflateWidget (package:flutter/src/widgets/framework.dart)
I/flutter : #33 Element.updateChild (package:flutter/src/widgets/framework.dart)
I/flutter : #34 ComponentElement.performRebuild (package:flutter/src/widgets/framework.dart)
I/flutter : #35 StatefulElement._firstBuild (package:flutter/src/widgets/framework.dart)
I/flutter : #36 ComponentElement.mount (package:flutter/src/widgets/framework.dart)
I/flutter : #37 Element.inflateWidget (package:flutter/src/widgets/framework.dart)
I/flutter : #38 Element.updateChild (package:flutter/src/widgets/framework.dart)
I/flutter : #39 ComponentElement.performRebuild (package:flutter/src/widgets/framework.dart)
I/flutter : #40 StatefulElement._firstBuild (package:flutter/src/widgets/framework.dart)
I/flutter : #41 ComponentElement.mount (package:flutter/src/widgets/framework.dart)
I/flutter : #42 SingleChildRenderObjectElement.mount (package:flutter/src/widgets/framework.dart)
I/flutter : #43 Element.inflateWidget (package:flutter/src/widgets/framework.dart)
I/flutter : #44 Element.updateChild (package:flutter/src/widgets/framework.dart)
I/flutter : #45 ComponentElement.performRebuild (package:flutter/src/widgets/framework.dart)
...isn't exactly redundant, but it'd be nice if we could output something cleaner and easier to understand. Right now we often end up with hundreds of stack frames with this kind of thing.