Fix build warnings after update to Rust 1.77

Part-of: <https://gitlab.freedesktop.org/gstreamer/gstreamer-rs/-/merge_requests/1413>

gstreamer-mpegts/src/lib.rs

@@ -22,5 +22,6 @@ pub fn init() {
     assert_initialized_main_thread!();
 }
 
+// Workaround for https://github.com/gtk-rs/gir/issues/1555.
+#[allow(unused_imports)]
 mod auto;
-pub use crate::auto::*;

gstreamer-rtp/src/rtp_base_depayload.rs

@@ -1,4 +1,5 @@
-use glib::{prelude::*, translate::*};
+use glib::prelude::*;
+use glib::translate::FromGlibPtrBorrow;
 
 use crate::RTPBaseDepayload;