Remove UserDataRepositoryTest from ravenwood test

This is a preparation before moving

  InputMethodManagerService#mHardwareKeyboardShortcutController

to UserData so that each user can keep maintaining its own instance.

We will soon introduce more dependencies on other system server
components (e.g. SecureSettingsWrapper), which are not yet ready to
run in the ravenwood environment, into UserData object. This means
that we need to remove

  UserDataRepositoryTest

from ravenwood tests until we figure out a better solution.

Note that the same test remains to be running (and passing) on a real
device. There must be no reduced test coverage.

Bug: 305849394
Test: presubmit
Test: atest --host FrameworksInputMethodSystemServerTestsRavenwood
Flag: TEST_ONLY
Change-Id: I1e23182afa8ad50e2c927fe3d545860039a488b3