Jason Simmons 7405924bf1 Do not drop the DartExecutor's message handler when a FlutterNativeView is detached from the FlutterView (flutter/engine#8254)
An activity can use ViewFactory.retainNativeFlutterView to reuse a
FlutterNativeView across multiple instances of the activity.  In this
scenario, the FlutterNativeView should continue to handle incoming messages
sent from Dart.
2019-03-21 18:08:58 -07:00
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