Update .gitignore to include Gradle and Android files

Added additional ignored files and directories for Gradle, Android Studio, and IntelliJ.

.idea/.gitignore

@@ -1,3 +1,34 @@
-# Default ignored files
+# Gradle files
-/shelf/
+.gradle/
-/workspace.xml
+build/
+
+# Local configuration file (sdk path, etc)
+local.properties
+
+# Log/OS Files
+*.log
+
+# Android Studio generated files and folders
+captures/
+.externalNativeBuild/
+.cxx/
+*.aab
+*.apk
+output-metadata.json
+
+# IntelliJ
+*.iml
+.idea/
+misc.xml
+deploymentTargetDropDown.xml
+render.experimental.xml
+
+# Keystore files
+*.jks
+*.keystore
+
+# Google Services (e.g. APIs or Firebase)
+google-services.json
+
+# Android Profiling
+*.hprof