adding week3 labs

Labs/Lab3_DangerousApp/.gitignore

Labs/Lab3_DangerousApp/app/build.gradle

Labs/Lab3_DangerousApp/app/src/main/AndroidManifest.xml

...c/main/java/course/labs/dangerousapp/DangerousActivity.kt

...ngerousApp/app/src/main/res/drawable-hdpi/ic_launcher.png

...ngerousApp/app/src/main/res/drawable-mdpi/ic_launcher.png

...gerousApp/app/src/main/res/drawable-xhdpi/ic_launcher.png

...erousApp/app/src/main/res/drawable-xxhdpi/ic_launcher.png

...b3_DangerousApp/app/src/main/res/layout/activity_main.xml

Labs/Lab3_DangerousApp/app/src/main/res/values/dimens.xml

Labs/Lab3_DangerousApp/app/src/main/res/values/strings.xml

Labs/Lab3_DangerousApp/app/src/main/res/values/styles.xml

Labs/Lab3_DangerousApp/build.gradle

Labs/Lab3_DangerousApp/gradle/wrapper/gradle-wrapper.jar

...ab3_DangerousApp/gradle/wrapper/gradle-wrapper.properties

Labs/Lab3_DangerousApp/gradlew

Labs/Lab3_DangerousApp/gradlew.bat

Labs/Lab3_DangerousApp/ic_launcher-web.png

Labs/Lab3_DangerousApp/import-summary.txt

Labs/Lab3_DangerousApp/proguard-project.txt