Update some link (meta-pytorch#201)

Author: kirklandsign

llm/android/LlamaDemo/app/src/androidTest/java/com/example/executorchllamademo/PresetSanityTest.kt

@@ -40,7 +40,7 @@ class PresetSanityTest {
 
     companion object {
         private const val TAG = "PresetSanityTest"
-        private const val DEFAULT_CONFIG_URL = "https://raw.githubusercontent.com/meta-pytorch/executorch-examples/889ccc6e88813cbf03775889beed29b793d0c8db/llm/android/LlamaDemo/app/src/main/assets/preset_models.json"
+        private const val DEFAULT_CONFIG_URL = "https://raw.githubusercontent.com/meta-pytorch/executorch-examples/615fa601fd75493ab0e1828c14bbd24f83cd5133/llm/android/LlamaDemo/app/src/main/assets/preset_models.json"
     }
 
     @get:Rule

llm/android/LlamaDemo/app/src/main/java/com/example/executorchllamademo/ui/screens/SelectPresetModelScreen.kt

@@ -58,7 +58,7 @@ import com.example.executorchllamademo.ui.theme.LocalAppColors
 import com.example.executorchllamademo.ui.viewmodel.ConfigLoadState
 import com.example.executorchllamademo.ui.viewmodel.ModelDownloadState
 
-private const val DEFAULT_CONFIG_URL = "https://raw.githubusercontent.com/meta-pytorch/executorch-examples/889ccc6e88813cbf03775889beed29b793d0c8db/llm/android/LlamaDemo/app/src/main/assets/preset_models.json"
+private const val DEFAULT_CONFIG_URL = "https://raw.githubusercontent.com/meta-pytorch/executorch-examples/615fa601fd75493ab0e1828c14bbd24f83cd5133/llm/android/LlamaDemo/app/src/main/assets/preset_models.json"
 
 @Composable
 fun SelectPresetModelScreen(

llm/android/LlamaDemo/run_instrumentation_test.sh

@@ -18,4 +18,5 @@ python -m pytorch_tokenizers.tools.llama2c.convert -t tokenizer.model -o tokeniz
 adb mkdir -p /data/local/tmp/llama
 adb push stories110m_h.pte /data/local/tmp/llama
 adb push tokenizer.bin /data/local/tmp/llama
+adb shell sync
 

llm/android/LlamaDemo/scripts/run-ci-tests.sh

@@ -50,6 +50,7 @@ for file in /tmp/llama_models/*; do
   while [ $retry -lt $max_retries ] && [ "$success" = "false" ]; do
     # Run push (ignore exit code, verify by checking file on device)
     timeout $timeout_secs adb push "$file" /data/local/tmp/llama/ || true
+    adb shell sync
 
     # Verify file was pushed by checking it exists and has correct size
     device_size=$(adb shell "stat -c%s /data/local/tmp/llama/$filename 2>/dev/null || echo 0" | tr -d '\r')