Add Android project structure and GitHub Actions workflow for APK build

Co-authored-by: johndoe6345789 <224850594+johndoe6345789@users.noreply.github.com>

.gitignore

@@ -24,4 +24,19 @@ hs_err_pid*
 replay_pid*
 
 # Kotlin Gradle plugin data, see https://kotlinlang.org/docs/whatsnew20.html#new-directory-for-kotlin-data-in-gradle-projects
-.kotlin/
+.kotlin/
+
+# Android Studio
+*.iml
+.gradle
+/local.properties
+/.idea/
+.DS_Store
+/build
+/captures
+.externalNativeBuild
+.cxx
+local.properties
+
+# Gradle
+!gradle-wrapper.jar