Only allow one concurrent AWS Device Farm run (#932)

.github/workflows/android-ci.yml

@@ -149,6 +149,7 @@ jobs:
 
       - name: Write uploads.env
         if: github.ref == 'refs/heads/main'
+        working-directory: .
         run: |
           echo "ANDROID_APP_ARN=${{ steps.upload-android-app.outputs.arn }}" >> uploads.env
           echo "ANDROID_TEST_ARN=${{ steps.upload-android-test.outputs.arn }}" >> uploads.env
@@ -174,6 +175,10 @@ jobs:
 
   instrumentation-test:
     needs: build
+    concurrency:
+      group: ${{ github.workflow }}-${{ github.ref }}
+      cancel-in-progress: false
+
     runs-on: ubuntu-latest
     if: github.ref == 'refs/heads/main'
     steps: