Bump com.android.tools.build:gradle from 8.3.1 to 8.4.0 in /android

Bumps com.android.tools.build:gradle from 8.3.1 to 8.4.0.

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

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

android/build.gradle

@@ -23,7 +23,7 @@ buildscript {
         jcenter()
     }
     dependencies {
-        classpath 'com.android.tools.build:gradle:8.3.1'
+        classpath 'com.android.tools.build:gradle:8.4.0'
 
         // NOTE: Do not place your application dependencies here; they belong
         // in the individual module build.gradle files