[Android] Add android test script

This patch adds a script to run unit tests on Android devices.

**Self evaluation:**
1. Build test: [X]Passed [ ]Failed [ ]Skipped
2. Run test: [X]Passed [ ]Failed [ ]Skipped

Signed-off-by: Donghyeon Jeong <[email protected]>

tools/android_test.sh

@@ -0,0 +1,42 @@
+#!/usr/bin/env bash
+#
+# This is a script to run NNTrainer unit tests on Android devices
+# Note that this script assumes to be run on the nntrainer root path.
+
+./tools/package_android.sh
+
+# You can modify test/jni/Android.mk to choose module that you wish to build
+cd test/jni
+
+# Perequisite: Install and configure the NDK
+ndk-build
+
+if [ $? != 0 ]; then
+  echo "ndk-build failed"
+  exit 1
+fi
+
+cd ../libs/arm64-v8a
+
+adb root
+
+if [ $? != 0 ]; then
+  echo "$0: adb root failed"
+  exit 1
+fi
+
+adb shell mkdir -p /data/local/tmp/nntr_android_test
+
+adb push . /data/local/tmp/nntr_android_test
+
+if [ $? != 0 ]; then
+  echo "$0: adb push failed to write to /data/local/tmp/nntr_android_test"
+  exit 1
+fi
+
+# To test unittest_layer, unittest_model, etc., golden data is required for the layer.
+# The steps are as follows.
+
+# $ meson build [flags...]
+# $ cd build
+# $ adb push res/ /data/local/tmp/nntr_android_test