message: TF Android Example first time compile and run FileNotFoundException bug fix
  java.lang.RuntimeException: java.io.FileNotFoundException: mobilenet_v1_1.0_224_quant.tflite
  this error reported after application compile and run first time using Studio, this fix solves the exist problem.
diff: apply plugin: 'com.android.application'
  +// import DownloadModels task
  +project.ext.ASSET_DIR = projectDir.toString() + '/src/main/assets'
  +project.ext.TMP_DIR = project.buildDir.toString() + '/downloads'
  +
  +// Download default models; if you wish to use your own models then
  +// place them in the "assets" directory and comment out this line.
  +apply from: "download-models.gradle"
  +
  android {
  compileSdkVersion 26
  buildToolsVersion '26.0.2'
  @@ -36,14 +44,6 @@ repositories {
  }
  }
  -// import DownloadModels task
  -project.ext.ASSET_DIR = projectDir.toString() + '/src/main/assets'
  -project.ext.TMP_DIR = project.buildDir.toString() + '/downloads'
  -
  -// Download default models; if you wish to use your own models then
  -// place them in the "assets" directory and comment out this line.
  -apply from: "download-models.gradle"
  -
  dependencies {
  compile fileTree(dir: 'libs', include: ['*.jar'])
  compile 'org.tensorflow:tensorflow-lite:0.0.0-nightly'
  