v3.0

add android real application

modified from tensorflow/example repo

how to build

export ANDROID_HOME=
cd android-app
# build debug apk
./gradlew assembleDebug #-Dhttp.proxyHost= -Dhttp.proxyPort=-Dhttps.proxyHost= -Dhttps.proxyPort=
# build release apk
./gradlew assembleRelease
# get my-release-key.jks by yourself
# $ANDROID_HOME/build-tools/30.0.3/apksigner sign --ks /tmp/my-release-key.jks --out app-release.apk ./app/build/outputs/apk/release/app-release-unsigned.apk