update v1.14.0

csharp/test/Microsoft.ML.OnnxRuntime.Tests.Droid/Resources/values/colors.xml

+<?xml version="1.0" encoding="utf-8"?>
+<resources>
+    <color name="colorPrimary">#2c3e50</color>
+    <color name="colorPrimaryDark">#1B3147</color>
+    <color name="colorAccent">#3498db</color>
+</resources>

csharp/test/Microsoft.ML.OnnxRuntime.Tests.Droid/Resources/values/ic_launcher_background.xml

+<?xml version="1.0" encoding="utf-8"?>
+<resources>
+    <color name="ic_launcher_background">#2C3E50</color>
+</resources>

csharp/test/Microsoft.ML.OnnxRuntime.Tests.Droid/Resources/values/strings.xml

+<resources>
+    <string name="app_name">Microsoft.ML.OnnxRuntime.Tests.Droid</string>
+    <string name="action_settings">Settings</string>
+</resources>

csharp/test/Microsoft.ML.OnnxRuntime.Tests.Droid/Resources/values/styles.xml

+<resources>
+
+    <!-- Base application theme. -->
+    <style name="AppTheme" parent="MainTheme.Base">
+       <!-- As of Xamarin.Forms 4.6 the theme has moved into the Forms binary -->
+        <!-- If you want to override anything you can do that here. -->
+        <!-- Underneath are a couple of entries to get you started. -->
+
+        <!-- Set theme colors from https://aka.ms/material-colors -->
+        <!-- colorPrimary is used for the default action bar background -->
+        <item name="colorPrimary">#2196F3</item>
+        <!-- colorPrimaryDark is used for the status bar -->
+        <item name="colorPrimaryDark">#1976D2</item>
+        <!-- colorAccent is used as the default value for colorControlActivated
+             which is used to tint widgets -->
+        <item name="colorAccent">#3498db</item>
+    </style>
+
+</resources>