Fix env in android perf so aar build (#5330)

Summary: Pull Request resolved: #5330

Reviewed By: huydhn

Differential Revision: D62610791

Pulled By: kirklandsign

fbshipit-source-id: fa38844548570302ac8944de4340a355a33a4733

Author: kirklandsign

.github/workflows/android-perf.yml

@@ -229,10 +229,9 @@ jobs:
 
         PYTHON_EXECUTABLE=python bash .ci/scripts/setup-qnn-deps.sh
         PYTHON_EXECUTABLE=python bash .ci/scripts/build-qnn-sdk.sh
-        export EXECUTORCH_BUILD_QNN=ON
 
         export ANDROID_ABIS="arm64-v8a"
-        bash build/build_android_llm_demo.sh ${ARTIFACTS_DIR_NAME}
+        PYTHON_EXECUTABLE=python EXECUTORCH_BUILD_QNN=ON QNN_SDK_ROOT=/tmp/qnn/2.25.0.240728 bash build/build_android_llm_demo.sh ${ARTIFACTS_DIR_NAME}
 
   # Upload artifacts to S3. The artifacts are needed not only by the device farm but also TorchChat
   upload-android-apps: