terminal works basically. (#12189)

* terminal works basically.
todo:
- persistent
- sessions restore
- web
- mobile

* missed terminal persistent option change

* android sdk 34 -> 35

* +#![cfg_attr(lt_1_77, feature(c_str_literals))]

* fixing ci

* fix ci

* fix ci for android

* try "Fix Android SDK Platform 35"

* fix android 34

* revert flutter_plugin_android_lifecycle to 2.0.17 which used in rustdesk 1.4.0

* refactor, but break something of desktop terminal (new tab showing loading)

* fix connecting...

flutter/lib/mobile/pages/settings_page.dart

@@ -815,7 +815,7 @@ class _SettingsState extends State<SettingsPage> with WidgetsBindingObserver {
             !outgoingOnly &&
             !hideSecuritySettings)
           SettingsSection(
-            title: Text(translate("Share Screen")),
+            title: Text(translate("Share screen")),
             tiles: shareScreenTiles,
           ),
         if (!bind.isIncomingOnly()) defaultDisplaySection(),