ci(workflows): ternary GRADLE_USER_HOME for namespace runner home path

Author: jluque0101

.github/workflows/build-android-e2e.yml

@@ -37,7 +37,7 @@ jobs:
     runs-on: ${{ inputs.runner_provider == 'namespace' && 'namespace-profile-metamask-android-build' || 'ghcr.io/cirruslabs/ubuntu-runner-amd64:24.04-lg' }} # Optimized for lg runner (48GB) with conservative memory settings
     timeout-minutes: 40
     env:
-      GRADLE_USER_HOME: /home/admin/_work/.gradle
+      GRADLE_USER_HOME: ${{ inputs.runner_provider == 'namespace' && '/home/runner/_work/.gradle' || '/home/admin/_work/.gradle' }}
       CACHE_GENERATION: v1 # Increment this to bust the cache (v1, v2, v3, etc.)
       YARN_ENABLE_GLOBAL_CACHE: 'true' # Enable Yarn global cache for faster installs
     outputs: