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...

.github/workflows/playground.yml

@@ -266,7 +266,7 @@ jobs:
                libayatana-appindicator3-dev\
                libasound2-dev \
                libc6-dev \
-               libclang-11-dev \
+               libclang-dev \
                libunwind-dev \
                libgstreamer1.0-dev \
                libgstreamer-plugins-base1.0-dev \
@@ -280,7 +280,7 @@ jobs:
                libxcb-xfixes0-dev \
                libxdo-dev \
                libxfixes-dev \
-               llvm-11-dev \
+               llvm-dev \
                nasm \
                yasm \
                ninja-build \