Revert #160653 Fix view removal process for AutofillContextAction.cancel (#172490)

Between #145681 (autofill save prompt shows up for password fields when
you dismiss the keyboard) and #172250 (calling `TextInput.hide` causes
the current active text field to lose its text) the latter seems to be
the worse bug. The framework `EditableText` implementation only calls
`TextInput.hide` when switching input controls, so #172250 typically
does not affect flutter text fields itself, but becomes a problem if the
app wishes to add UI (similar to the iOS down-arrow button that would
show up above the keyboard when you're filling out a form) to dismiss
the keyboard.

This reopens #145681. See
https://github.com/flutter/flutter/issues/145681#issuecomment-3098865633

@koji-1009 does reverting sound ok to you?

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https://dart.googlesource.com/external/github.com/flutter/flutter/+/be9526fbaaaab9474e95d196b70c41297eeda2d0
diff --git a/DEPS b/DEPS
index 4e5dc3a..5a068bc 100644
--- a/DEPS
+++ b/DEPS
@@ -231,7 +231,7 @@
 deps = {
   'flutter/engine/src/flutter/third_party/dart': Var('dart_git') + '/sdk' + '@' + '58c09c24edf11ebfe90b5c3cd0e2648491ea35c9',
 
-  'flutter': Var('flutter_git') + '/mirrors/flutter' + '@' + '6b7d92852c492f601884c2da3f3cc586b4fb32fc',
+  'flutter': Var('flutter_git') + '/mirrors/flutter' + '@' + 'be9526fbaaaab9474e95d196b70c41297eeda2d0',
 
   'flutter/engine/src/flutter/third_party/depot_tools':
   Var('chromium_git') + '/chromium/tools/depot_tools.git' + '@' + '580b4ff3f5cd0dcaa2eacda28cefe0f45320e8f7',
diff --git a/commits.json b/commits.json
index 8c193ec..cf1e4d8 100644
--- a/commits.json
+++ b/commits.json
@@ -1,4 +1,4 @@
 {
-  "flutter":"6b7d92852c492f601884c2da3f3cc586b4fb32fc",
+  "flutter":"be9526fbaaaab9474e95d196b70c41297eeda2d0",
   "flutter/engine/src/flutter/third_party/dart":"58c09c24edf11ebfe90b5c3cd0e2648491ea35c9"
 }
\ No newline at end of file