Add on-device tex-to-speech (TTS) demo for HarmonyOS (#1590)

harmony-os/SherpaOnnxTts/AppScope/app.json5

@@ -0,0 +1,10 @@
+{
+  "app": {
+    "bundleName": "com.k2fsa.sherpa.onnx.tts",
+    "vendor": "next-gen Kaldi",
+    "versionCode": 1000000,
+    "versionName": "1.0.0",
+    "icon": "$media:app_icon",
+    "label": "$string:app_name"
+  }
+}

harmony-os/SherpaOnnxTts/AppScope/resources/base/element/string.json

@@ -0,0 +1,8 @@
+{
+  "string": [
+    {
+      "name": "app_name",
+      "value": "SherpaOnnxTts"
+    }
+  ]
+}