Define all the entry-level display info in Entry.

Note that the UI has not started using the
new jetpack entry classes (defined under
packages/CredentialManager/src/com/android/credentialmanager/jetpack).
Next, the existing *UI.kt files under
packages/CredentialManager/src/com/android/credentialmanager needs to be
removed and the UI begin adopting these new structures.

Test: deployed locally
Bug: 247855226
Bug: 253156958
Change-Id: I35c48a4a224fad019efc10b841a1910ae940185c