Update to Android SDK 34

Currently Android 14 is still Beta but will be released soon. At that point we should update the targetSDK and compile SDK

• this will include updates on various androidx dependencies as well
• an update of Gradle and the Gradle plugin should be done

According to https://android-developers.googleblog.com/2023/08/android-14-beta-5.html, it seems there are no relevant platform changes for this project.