Bump agpVersion from 8.6.1 to 8.8.0

Bumps `agpVersion` from 8.6.1 to 8.8.0.

Updates `com.android.tools.build:gradle-api` from 8.6.1 to 8.8.0

Updates `com.android.tools.build:gradle` from 8.6.1 to 8.8.0

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

build.gradle

@@ -14,7 +14,7 @@ repositories {
 }
 
 def freefairGradleVersion = "8.7.1"
-def agpVersion = "8.6.1"
+def agpVersion = "8.8.0"
 
 group = 'io.freefair.gradle'
 description = "FreeFair Android Gradle Plugins"