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Making sure window inset controller is not null
In some cases the controller can be null if the view is no longer connected to the window. Also, this issue seems to only happen in cuttlefish instances so there might be a weird behaviour going on there but in any case is good to check for nulls. Test: No testing require is only null checkin, just making sure it compiles. Bug: 302869930 Change-Id: I88d6091b57293e9493385185bfeb3e470c9bad84