Updates AGP to 9.1.0, Gradle to 9.5.0, and JDK to 21.

Android/.gitignore

@@ -1,16 +1,20 @@
-*.iml
+.artifacts
 .gradle
-/local.properties
-/.idea/caches
-/.idea/libraries
-/.idea/modules.xml
-/.idea/workspace.xml
-/.idea/navEditor.xml
-/.idea/assetWizardSettings.xml
-/.idea/dictionaries
-/build
-/captures
+.idea/appInsightsSettings.xml
+.idea/caches
+.idea/compiler.xml
+.idea/deploymentTargetSelector.xml
+.idea/deviceManager.xml
+.idea/gradle.xml
+.idea/markdown.xml
+.idea/migrations.xml
+.idea/planningMode.xml
+.idea/studiobot.xml
+.idea/workspace.xml
+.DS_Store
 .externalNativeBuild
 .cxx
-/app/debug
-/app/release
+*.iml
+build
+captures
+local.properties