use flutter 3.13 for android because its video super slow on my phone

.github/workflows/flutter-build.yml

@@ -16,6 +16,7 @@ env:
   CARGO_NDK_VERSION: "3.1.2"
   LLVM_VERSION: "15.0.6"
   FLUTTER_VERSION: "3.19.6"
+  ANDROID_FLUTTER_VERSION: "3.13.9" # >= 3.16 is very slow on my android phone, but work well on most of others. We may switch to new flutter after changing to texture rendering (I believe it can solve my problem).
   FLUTTER_RUST_BRIDGE_VERSION: "1.80.1"
   # for arm64 linux because official Dart SDK does not work
   FLUTTER_ELINUX_VERSION: "3.16.9"
@@ -811,7 +812,7 @@ jobs:
         uses: subosito/flutter-action@v2
         with:
           channel: "stable"
-          flutter-version: ${{ env.FLUTTER_VERSION }}
+          flutter-version: ${{ env.ANDROID_FLUTTER_VERSION }}
       - uses: nttld/setup-ndk@v1
         id: setup-ndk
         with:
@@ -853,6 +854,13 @@ jobs:
           prefix-key: rustdesk-lib-cache-android # TODO: drop '-android' part after caches are invalidated
           key: ${{ matrix.job.target }}
 
+      - name: fix android for flutter 3.13
+        if: $${{ env.ANDROID_FLUTTER_VERSION == '3.13.9' }}
+        run: |
+          sed -i 's/uni_links_desktop/#uni_links_desktop/g' flutter/pubspec.yaml
+          cd flutter/lib
+          find . | grep dart | xargs sed -i 's/textScaler: TextScaler.linear(\(.*\)),/textScaleFactor: \1,/g'
+
       - name: Build rustdesk lib
         env:
           ANDROID_NDK_HOME: ${{ steps.setup-ndk.outputs.ndk-path }}