add dependency on open_mail_app

pubspec.lock

@@ -809,6 +809,13 @@ packages:
       url: "https://pub.dartlang.org"
     source: hosted
     version: "3.2.1"
+  open_mail_app:
+    dependency: "direct main"
+    description:
+      name: open_mail_app
+      url: "https://pub.dartlang.org"
+    source: hosted
+    version: "0.4.5"
   package_info_plus:
     dependency: "direct main"
     description:

pubspec.yaml

@@ -82,7 +82,9 @@ dependencies:
   motionphoto:
     git: "https://github.com/ente-io/motionphoto.git"
   move_to_background: ^1.0.2
+
   open_file: ^3.2.1
+  open_mail_app: ^0.4.5
   package_info_plus: ^1.0.1
   page_transition: ^2.0.2
   path_provider: ^2.0.1