Allow user to define ANDROID_ABIS in build_android_llm_demo.sh

Allow build arm64-v8a only

Pull Request resolved: #5109
---------

Co-authored-by: Huy Do <[email protected]>

Author: kirklandsign

.github/workflows/android-perf.yml

@@ -230,9 +230,10 @@ jobs:
             PYTHON_EXECUTABLE=python bash .ci/scripts/setup-qnn-deps.sh
             PYTHON_EXECUTABLE=python bash .ci/scripts/build-qnn-sdk.sh
         fi
-        
+
         # TODO: This needs to be replaced with a generic loader .apk
         # Build LLM Demo for Android
+        export ANDROID_ABIS="arm64-v8a"
         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

build/build_android_llm_demo.sh

@@ -139,7 +139,9 @@ collect_artifacts_to_be_uploaded() {
 
 BUILD_AAR_DIR="$(mktemp -d)"
 export BUILD_AAR_DIR
-ANDROID_ABIS=("arm64-v8a" "x86_64")
+if [ -z "$ANDROID_ABIS" ]; then
+  ANDROID_ABIS=("arm64-v8a" "x86_64")
+fi
 export ANDROID_ABIS
 
 ARTIFACTS_DIR_NAME="$1"