Update the preupload hooks for this repo.

* Sort Java imports.
* google-java-format/-diff are specified in the global preupload config.
* Don't specifically call out files for checkstyle; apply it to all.

Test: none
Bug: 257533056
Change-Id: I91c87cfe269de154f98db590d71bd67e3aa2bbfe
(cherry picked from commit 5fa0fc4f96a7eb8a68b0369b73251643e8cb70ce)
(cherry picked from commit cbeebf772f368ea1a645b5e0ed7e58685cc0f6e6)