Add support for Phi4

Add support for Phi4

Author: schmidt-sebastian

examples/llm_inference/android/app/src/main/java/com/google/mediapipe/examples/llminference/ChatUiState.kt

@@ -43,7 +43,7 @@ class ChatUiState(
     messages: List<ChatMessage> = emptyList()
 ) : UiState {
     private val _messages: MutableList<ChatMessage> = messages.toMutableStateList()
-    override val messages: List<ChatMessage> = _messages.reversed()
+    override val messages: List<ChatMessage> = _messages.asReversed()
 
     override fun createLoadingMessage(): String {
         val chatMessage = ChatMessage(author = MODEL_PREFIX, isLoading = true)

examples/llm_inference/android/app/src/main/java/com/google/mediapipe/examples/llminference/Model.kt

@@ -42,4 +42,14 @@ enum class Model(
         topK = 40,
         topP = 0.7f
     ),
+    PHI4_CPU(
+        path = "/data/local/tmp/llm/phi4_q8_ekv1280.task",
+        url = "https://huggingface.co/litert-community/Phi-4-mini-instruct/resolve/main/phi4_q8_ekv1280.task",
+        licenseUrl = "",
+        needsAuth = false,
+        ChatUiState(),
+        temperature = 0.0f,
+        topK = 40,
+        topP = 1.0f
+    ),
 }