Fix trivial unused_qualification lint violations

Rust 1.78 is again detecting more violators of this lint.

ndk/src/bitmap.rs

@@ -325,8 +325,8 @@ pub enum BitmapInfoFlagsAlpha {
 pub struct BitmapInfoFlags(u32);
 
 #[cfg(feature = "api-level-30")]
-impl std::fmt::Debug for BitmapInfoFlags {
-    fn fmt(&self, f: &mut std::fmt::Formatter<'_>) -> std::fmt::Result {
+impl fmt::Debug for BitmapInfoFlags {
+    fn fmt(&self, f: &mut fmt::Formatter<'_>) -> fmt::Result {
         write!(
             f,
             "BitmapInfoFlags({:#x}, alpha: {:?}, is_hardware: {})",
@@ -365,8 +365,8 @@ pub struct BitmapInfo {
     inner: ffi::AndroidBitmapInfo,
 }
 
-impl std::fmt::Debug for BitmapInfo {
-    fn fmt(&self, f: &mut std::fmt::Formatter<'_>) -> std::fmt::Result {
+impl fmt::Debug for BitmapInfo {
+    fn fmt(&self, f: &mut fmt::Formatter<'_>) -> fmt::Result {
         let mut f = f.debug_struct("BitmapInfo");
         f.field("width", &self.width())
             .field("height", &self.height())

ndk/src/font.rs

@@ -8,7 +8,7 @@
 
 use std::convert::TryFrom;
 use std::ffi::{CStr, OsStr};
-use std::fmt::{self, Write};
+use std::fmt::{self, Write as _};
 use std::os::unix::prelude::OsStrExt;
 use std::path::Path;
 use std::ptr::NonNull;

ndk/src/input_queue.rs

@@ -130,7 +130,7 @@ impl InputQueue {
                 looper.ptr().as_ptr(),
                 id,
                 None,
-                std::ptr::null_mut(),
+                ptr::null_mut(),
             )
         }
     }

ndk/src/media/image_reader.rs

@@ -8,12 +8,7 @@ use crate::media_error::{construct, construct_never_null, MediaError, Result};
 use crate::native_window::NativeWindow;
 use crate::utils::abort_on_panic;
 use num_enum::{FromPrimitive, IntoPrimitive};
-use std::{
-    ffi::c_void,
-    fmt::{self, Debug, Formatter},
-    mem::MaybeUninit,
-    ptr::NonNull,
-};
+use std::{ffi::c_void, fmt, mem::MaybeUninit, ptr::NonNull};
 
 #[cfg(feature = "api-level-26")]
 use std::os::fd::{FromRawFd, IntoRawFd, OwnedFd};
@@ -120,8 +115,8 @@ pub struct ImageReader {
     buffer_removed_cb: Option<Box<BufferRemovedListener>>,
 }
 
-impl Debug for ImageReader {
-    fn fmt(&self, f: &mut Formatter<'_>) -> fmt::Result {
+impl fmt::Debug for ImageReader {
+    fn fmt(&self, f: &mut fmt::Formatter<'_>) -> fmt::Result {
         f.debug_struct("ImageReader")
             .field("inner", &self.inner)
             .field(