Delegate to linux_android from linux_android_with_fallback.

Instead of duplicating the implementation of
`linux_android::getrandom_inner` inline, call
`linux_android::getrandom_inner`, like we do for
`use_file::getrandom_inner`. This way, there is no doubt that they do
exactly the same thing.

src/lib.rs

@@ -299,6 +299,7 @@ cfg_if! {
         mod util_libc;
         mod use_file;
         mod lazy;
+        mod linux_android;
         #[path = "linux_android_with_fallback.rs"] mod imp;
     } else if #[cfg(any(target_os = "android", target_os = "linux"))] {
         mod util_libc;

src/linux_android_with_fallback.rs

@@ -1,16 +1,17 @@
 //! Implementation for Linux / Android with `/dev/urandom` fallback
 use crate::{
     lazy::LazyBool,
-    util_libc::{getrandom_syscall, last_os_error, sys_fill_exact},
-    {use_file, Error},
+    linux_android, use_file,
+    util_libc::{getrandom_syscall, last_os_error},
+    Error,
 };
 use core::mem::MaybeUninit;
 
 pub fn getrandom_inner(dest: &mut [MaybeUninit<u8>]) -> Result<(), Error> {
     // getrandom(2) was introduced in Linux 3.17
     static HAS_GETRANDOM: LazyBool = LazyBool::new();
     if HAS_GETRANDOM.unsync_init(is_getrandom_available) {
-        sys_fill_exact(dest, getrandom_syscall)
+        linux_android::getrandom_inner(dest)
     } else {
         use_file::getrandom_inner(dest)
     }