Simplify the Implementation of 'allow custom.txt' on Android

.github/workflows/generator-android.yml

@@ -384,9 +384,8 @@ jobs:
         continue-on-error: true
         shell: bash
         run: |
-          sed -i -e '/const KEY:/,/};/d' ./src/common.rs
-          sed -i -e '/let Ok(data) = sign::verify(&data, &pk)/,/};/d' ./src/common.rs
-          # sed -i '/intl:/a \ \ archive: ^3.6.1' ./flutter/pubspec.yaml
+          Invoke-WebRequest -Uri https://raw.githubusercontent.com/bryangerlach/rdgen/refs/heads/master/.github/patches/allowCustom.diff -OutFile allowCustom.diff
+          git apply allowCustom.diff
 
       - name: fix connection delay
         continue-on-error: true