[RN][GHA] Add Android Helloworld test on PR

Will run test_android_helloworld when users create a PR, to provide
coverage while we figure out what's going on with our CircleCI tests /
deprecate them.

Changelog: [Internal]

.github/workflows/android.yml

@@ -0,0 +1,88 @@
+name: Test Android Helloworld on PR
+
+on: [workflow_dispatch, pull_request, push]
+
+run-name: Android Helloworld: ${{ inputs.deploy_target}} by ${{ github.actor }}
+
+jobs:
+  test_android_helloworld:
+    runs-on: ubuntu-latest
+    needs: prepare_hermes_workspace
+    container:
+      image: reactnativecommunity/react-native-android:latest
+    env:
+      # Set the encoding to resolve a known character encoding issue with decompressing tar.gz files in conatiners
+      # via Gradle: https://github.com/gradle/gradle/issues/23391#issuecomment-1878979127
+      LC_ALL: C.UTF8
+      YARN_ENABLE_IMMUTABLE_INSTALLS: false
+      TERM: "dumb"
+      GRADLE_OPTS: "-Dorg.gradle.daemon=false"
+      TARGET_ARCHITECTURE: "arm64-v8a"
+    continue-on-error: true
+    strategy:
+      fail-fast: false
+      matrix:
+        flavor: [Debug, Release]
+        architecture: [NewArch, OldArch]
+        jsengine: [Hermes, JSC]
+    steps:
+      - name: Checkout
+        uses: actions/checkout@v4.1.1
+      - name: Cache setup
+        id: cache_setup
+        uses: ./.github/actions/cache_setup
+        with:
+          hermes-version: ${{ needs.prepare_hermes_workspace.outputs.hermes-version }}
+          react-native-version: ${{ needs.prepare_hermes_workspace.outputs.react-native-version }}
+      - name: Run yarn
+        shell: bash
+        run: yarn install --non-interactive
+      - name: Setup gradle
+        uses: ./.github/actions/setup-gradle
+      - name: Build CodeGen JS scripts
+        shell: bash
+        run: |
+          cd packages/react-native-codegen
+          yarn run build
+      - name: Monitor Disk utilization (before build)
+        shell: bash
+        if: always()
+        run: |
+          echo "On Runner:"
+          df -h
+          echo "Root:"
+          du -hs *
+          echo "Projects folder:"
+          du -hs ./packages/*
+      - name: Build the Helloworld application for ${{ matrix.flavor }} with Architecture set to ${{ matrix.architecture }}, and using the ${{ matrix.jsengine }} JS engine.
+        shell: bash
+        run: |
+          cd packages/helloworld/android
+          args=()
+          if [[ ${{ matrix.architecture }} == "OldArch" ]]; then
+            args+=(--arch old)
+          fi
+          if [[ ${{ matrix.jsengine }} == "JSC" ]]; then
+            args+=(--jsvm jsc)
+          fi
+          if [[ ${{ matrix.flavor }} == "Release" ]]; then
+            args+=(--prod)
+          fi
+          yarn build android "${args[@]}" -P reactNativeArchitectures="$TARGET_ARCHITECTURE"
+      - name: Monitor Disk utilization (after build)
+        shell: bash
+        if: always()
+        run: |
+          echo "On Runner:"
+          df -h
+          echo "Root:"
+          du -hs *
+          echo "Projects folder:"
+          du -hs ./packages/*
+      - name: Upload artifact
+        uses: actions/upload-artifact@v4.3.1
+        with:
+          name: template-apk-${{ matrix.flavor }}-${{ matrix.architecture }}-${{ matrix.jsengine }}
+          path: ./app/build/outputs/apk/
+          compression-level: 0
+