chore(deps): bump com.android.tools.build:gradle in /mobile/android

Bumps com.android.tools.build:gradle from 7.4.0-alpha02 to 8.4.0-alpha09.

---
updated-dependencies:
- dependency-name: com.android.tools.build:gradle
  dependency-type: direct:production
  update-type: version-update:semver-major
...

Signed-off-by: dependabot[bot] <support@github.com>

mobile/android/build.gradle

@@ -26,7 +26,7 @@ buildscript {
     }
 
     dependencies {
-        classpath 'com.android.tools.build:gradle:7.4.0-alpha02'
+        classpath 'com.android.tools.build:gradle:8.4.0-alpha09'
     }
 }