ohos/android: Fix some compiler warnings (#34178)

* ohos: Remove unnecessary library links

`ohos-sys` now correctly links all required libraries, so we
don't need to specify them here again.
We still specify `ace_napi.z`, since we use napi via `napi-ohos`, which currently does not add the required link.

Signed-off-by: Jonathan Schwender <jonathan.schwender@huawei.com>

* Disable some unused functions on ohos/android

- get_default_url()
- parse_url_or_filename()
- add_noto_fallback_families

Signed-off-by: Jonathan Schwender <jonathan.schwender@huawei.com>

* ohos: Remove unneeded import

Signed-off-by: Jonathan Schwender <jonathan.schwender@huawei.com>

---------

Signed-off-by: Jonathan Schwender <jonathan.schwender@huawei.com>

ports/servoshell/egl/ohos.rs

@@ -34,12 +34,8 @@ use super::servo_glue::ServoGlue;
 mod resources;
 mod simpleservo;
 
-// Todo: in the future these libraries should be added by Rust sys-crates
+// Can be removed once <https://github.com/ohos-rs/ohos-rs/pull/105> is merged / released.
 #[link(name = "ace_napi.z")]
-#[link(name = "ace_ndk.z")]
-#[link(name = "hilog_ndk.z")]
-#[link(name = "native_window")]
-#[link(name = "clang_rt.builtins", kind = "static")]
 extern "C" {}
 
 #[napi(object)]