Add `art-profile-extra` for manual profile entries

Creates a new file and corresponding genrule to combine it with the main
`art-profile` for system services. `art-profile` is maintained by
automated tooling, but we now have at least one case
(`CtsDynamicInstrumentationManagerTest`) that relies on certain code in
system server being AOT compiled. It is also considered generally useful
to have a way to add entries manually, independent of automated tooling.

`art-profile-extra` is created so we can maintain those manual entries.
The `art-profile-combined` genrule concatenates `art-profile` and
`art-profile-extra` into one file for use by ART to execute AOT
compilation.

The current entry
`ActivityManagerService$LocalService->checkContentProviderAccess` is
referenced by `CtsDynamicInstrumentationManagerTest`. Said method is
redundant with `art-profile`, but putting it in `-extra` prevents said
automated tooling fom potentially breaking a CTS test.

Bug: 333751994
Test: TH
Flag: EXEMPT no behavior change intended
Change-Id: I1ef9739afc24765f760ba566b95064eca2ef74a4