feat: add app/src/main/res/values/themes.xml

feat: add app/src/main/res/values/strings.xml

feat: add app/src/main/res/values/colors.xml

feat: add app/src/main/res/layout/activity_main.xml

feat: add app/src/main/java/com/qclaw/helloworld/MainActivity.java

feat: add app/src/main/AndroidManifest.xml

feat: add app/proguard-rules.pro

feat: add app/build.gradle

feat: add settings.gradle

feat: add build.gradle

feat: add README.md

feat: add .gitignore