Add NNAPI E2E test for Android java package (#8912)

* Add NNAPI E2E test for Android java package

* address cr comment

java/src/test/android/app/src/androidTest/java/ai/onnxruntime/example/javavalidator/SimpleTest.kt

@@ -3,7 +3,9 @@ package ai.onnxruntime.example.javavalidator
 import ai.onnxruntime.OnnxTensor
 import ai.onnxruntime.OrtEnvironment
 import ai.onnxruntime.OrtException
+import ai.onnxruntime.OrtProvider
 import ai.onnxruntime.OrtSession.SessionOptions
+import android.util.Log
 import androidx.test.ext.junit.runners.AndroidJUnit4
 import androidx.test.platform.app.InstrumentationRegistry
 import org.junit.Assert
@@ -12,14 +14,44 @@ import org.junit.runner.RunWith
 import java.io.IOException
 import java.util.*
 
+private const val TAG = "ORTAndroidTest"
+
 @RunWith(AndroidJUnit4::class)
 class SimpleTest {
     @Test
-    @Throws(OrtException::class, IOException::class)
     fun runSigmoidModelTest() {
+        for (intraOpNumThreads in 1..4) {
+            runSigmoidModelTestImpl(intraOpNumThreads)
+        }
+    }
+
+    @Test
+    fun runSigmoidModelTestNNAPI() {
+        runSigmoidModelTestImpl(1, true)
+    }
+
+    @Throws(IOException::class)
+    private fun readModel(fileName: String): ByteArray {
+        return InstrumentationRegistry.getInstrumentation().context.assets.open(fileName)
+            .readBytes()
+    }
+
+    @Throws(OrtException::class, IOException::class)
+    fun runSigmoidModelTestImpl(intraOpNumThreads: Int, useNNAPI: Boolean = false) {
+        Log.println(Log.INFO, TAG, "Testing with intraOpNumThreads=$intraOpNumThreads")
+        Log.println(Log.INFO, TAG, "Testing with useNNAPI=$useNNAPI")
         val env = OrtEnvironment.getEnvironment()
         env.use {
             val opts = SessionOptions()
+            opts.setIntraOpNumThreads(intraOpNumThreads)
+            if (useNNAPI) {
+                if (OrtEnvironment.getAvailableProviders().contains(OrtProvider.NNAPI)) {
+                    opts.addNnapi()
+                } else {
+                    Log.println(Log.INFO, TAG, "NO NNAPI EP available, skip the test")
+                    return
+                }
+            }
             opts.use {
                 val session = env.createSession(readModel("sigmoid.ort"), opts)
                 session.use {
@@ -40,6 +72,7 @@ class SimpleTest {
                     inputTensor.use {
                         val output = session.run(Collections.singletonMap(inputName, inputTensor))
                         output.use {
+                            @Suppress("UNCHECKED_CAST")
                             val rawOutput = output[0].value as Array<Array<FloatArray>>
                             for (i in 0..2) {
                                 for (j in 0..3) {
@@ -58,11 +91,4 @@ class SimpleTest {
             }
         }
     }
-
-
-    @Throws(IOException::class)
-    private fun readModel(fileName: String): ByteArray {
-        return InstrumentationRegistry.getInstrumentation().context.assets.open(fileName)
-            .readBytes()
-    }
 }