Migrate ktfmt check workflow to new builder

.github/workflows/android-kotlin-format-check.yml

@@ -19,7 +19,7 @@ permissions: {}
 jobs:
   prepare:
     name: Prepare
-    runs-on: ubuntu-latest
+    runs-on: android-build
     steps:
       - name: Checkout repository
         uses: actions/checkout@v4
@@ -40,18 +40,19 @@ jobs:
 
   check-formatting:
     needs: prepare
-    runs-on: ubuntu-latest
+    runs-on: android-build
     container:
       image: ${{ needs.prepare.outputs.container_image }}
+      volumes:
+        # node is symlinked in, w/o mounting it, when using a image node won't be found for the
+        # checkout action
+        # https://github.com/NixOS/nixpkgs/issues/306373
+        - /nix:/nix
+        - gradle-cache:/root/.gradle
     steps:
-      # Fix for HOME path overridden by GH runners when building in containers, see:
-      # https://github.com/actions/runner/issues/863
-      - name: Fix HOME path
-        run: echo "HOME=/root" >> $GITHUB_ENV
-
       - uses: actions/checkout@v4
         with:
           submodules: true
 
       - name: Run ktfmt check
-        run: android/gradlew -p android ktfmtCheck :build-logic:ktfmtCheck
+        run: android/gradlew -p android ktfmtCheck :build-logic:ktfmtCheck --no-daemon

ci/android/configuration.nix

@@ -267,6 +267,13 @@
       #containersConf.settings = {
       #  StopSignal = 9;
       #};
+
+      containersConf.settings = {
+        containers = {
+          # Increase pids_limit, otherwise ktfmt would always fail
+          pids_limit = 8096;
+        };
+      };
     };
     podman = {
       dockerSocket.enable = true;