Update dynamic links Android build's compile SDK version
Update dynamic links Android build's compile SDK version

Missed updating a number to 28.  While not technically necessary, since the targetSdkVersion is 28, for consistency with the other libraries dynamic links should be updated as well.

PiperOrigin-RevId: 256039327

firebase/firebase-cpp-sdk,firebase/firebase-cpp-sdk,firebase/firebase-cpp-sdk,firebase/firebase-cpp-sdk,firebase/firebase-cpp-sdk,firebase/firebase-cpp-sdk,firebase/firebase-cpp-sdk,firebase/firebase-cpp-sdk