Initial commit: LCK Control Android app

Multi-module Android app (app/shared/sdk) with backend-driven auth,
Quest Platform SDK login, YouTube/Twitch OAuth linking, stream
management via AIDL service. Compose UI with Hilt DI.

.gitignore

@@ -0,0 +1,20 @@
+*.iml
+.gradle
+/local.properties
+/.idea/caches
+/.idea/libraries
+/.idea/modules.xml
+/.idea/workspace.xml
+/.idea/navEditor.xml
+/.idea/assetWizardSettings.xml
+.DS_Store
+/build
+**/build/
+/captures
+.externalNativeBuild
+.cxx
+.kotlin
+local.properties
+
+# Platform tools
+ovr-platform-util.exe