Use workflow dispatch on a android/release tag for now

.github/workflows/android.yml

@@ -23,8 +23,8 @@ concurrency:
   cancel-in-progress: true
 
 jobs:
-  build-llm-demo:
-    name: build-llm-demo
+  build-aar:
+    name: build-aar
     uses: pytorch/test-infra/.github/workflows/linux_job.yml@main
     with:
       runner: linux.2xlarge
@@ -46,9 +46,38 @@ jobs:
         # Build LLM Demo for Android
         bash build/build_android_llm_demo.sh ${ARTIFACTS_DIR_NAME}
 
+        shasum -a 256 "${ARTIFACTS_DIR_NAME}/llm_demo/executorch.aar"
+
+  upload-release-aar:
+    name: upload-release-aar
+    needs: build-aar
+    if: ${{ startsWith(github.ref, 'refs/tags/android/release') }}
+    runs-on: ubuntu-22.04
+    timeout-minutes: 10
+    permissions:
+      id-token: write
+      contents: read
+    steps:
+      - name: configure aws credentials
+        uses: aws-actions/configure-aws-credentials@v1.7.0
+        with:
+          role-to-assume: arn:aws:iam::308535385114:role/gha_executorch_upload-frameworks-android
+          aws-region: us-east-1
+      - name: Upload AAR to RC if ciflow/android/release tag is present
+        shell: bash
+        run: |
+          wget https://gha-artifacts.s3.amazonaws.com/${{ github.repository }}/${{ github.run_id }}/artifacts/llm_demo/executorch.aar
+          shasum -a 256 executorch.aar > executorch.aar.sha256sums
+
+          pip install awscli==1.32.18
+          AWS_CMD="aws s3 cp"
+          VERSION_NAME="$(date +'%Y%m%d')"
+          ${AWS_CMD} executorch.aar s3://ossci-android/executorch/release/${VERSION_NAME}/executorch.aar --acl public-read
+          ${AWS_CMD} executorch.aar.sha256sums s3://ossci-android/executorch/release/${VERSION_NAME}/executorch.aar.sha256sums --acl public-read
+
   # Running Android emulator directly on the runner and not using Docker
   run-emulator:
-    needs: build-llm-demo
+    needs: build-aar
     # NB: Use metal install for KVM support to run the emulator faster
     runs-on: linux.24xl.spr-metal
     env: