add simple sample app

sampletorapp/.gitignore

sampletorapp/build.gradle

sampletorapp/proguard-rules.pro

...rg/torproject/android/sample/ExampleInstrumentedTest.java

sampletorapp/src/main/AndroidManifest.xml

...java/org/torproject/android/sample/sampleTorActivity.java

...rapp/src/main/res/drawable-v24/ic_launcher_foreground.xml

...letorapp/src/main/res/drawable/ic_launcher_background.xml

sampletorapp/src/main/res/layout/activity_sample_tor.xml

sampletorapp/src/main/res/mipmap-anydpi-v26/ic_launcher.xml

...rapp/src/main/res/mipmap-anydpi-v26/ic_launcher_round.xml

sampletorapp/src/main/res/mipmap-hdpi/ic_launcher.png

sampletorapp/src/main/res/mipmap-hdpi/ic_launcher_round.png

sampletorapp/src/main/res/mipmap-mdpi/ic_launcher.png

sampletorapp/src/main/res/mipmap-mdpi/ic_launcher_round.png

sampletorapp/src/main/res/mipmap-xhdpi/ic_launcher.png

sampletorapp/src/main/res/mipmap-xhdpi/ic_launcher_round.png

sampletorapp/src/main/res/mipmap-xxhdpi/ic_launcher.png

...letorapp/src/main/res/mipmap-xxhdpi/ic_launcher_round.png

sampletorapp/src/main/res/mipmap-xxxhdpi/ic_launcher.png