TF-3661 Fix memory leak file picker

pubspec.lock

@@ -588,10 +588,11 @@ packages:
   file_picker:
     dependency: "direct main"
     description:
-      name: file_picker
-      sha256: "2ca051989f69d1b2ca012b2cf3ccf78c70d40144f0861ff2c063493f7c8c3d45"
-      url: "https://pub.dev"
-    source: hosted
+      path: "."
+      ref: "fixbug/tmail-0.15.12-memory-leak"
+      resolved-ref: b9a5bf750554ca1b0cb98ae2b57167e5b0310582
+      url: "https://github.com/linagora/flutter_file_picker.git"
+    source: git
     version: "8.0.5"
   filesize:
     dependency: "direct main"

pubspec.yaml

@@ -297,6 +297,13 @@ dependency_overrides:
 
   json_annotation: 4.8.1
 
+  # TODO: Remove and upgrade file_picker after
+  # https://github.com/miguelpruivo/flutter_file_picker/pull/1771 is merged and published
+  file_picker:
+    git:
+      url: https://github.com/linagora/flutter_file_picker.git
+      ref: fixbug/tmail-0.15.12-memory-leak
+
 # For information on the generic Dart part of this file, see the
 # following page: https://dart.dev/tools/pub/pubspec