Add Android Runtime APEX directories to Bionic search paths.

- Insert /apex/com.android.runtime/lib(64) before /system/lib(64)
  in the default library search paths (`kDefaultLdPaths`,
  `kAsanDefaultLdPaths`).
- Insert apex/com.android.runtime/bin before /system/bin in the
  default shell search path (`_PATH_DEFPATH`).

Test: Device boot test with Android Runtime APEX.
Test: Device boot test without Android Runtime APEX.
Bug: 113373927
Change-Id: I9ae6bfe6939f63e7d76e7b3c9b21d8b698bd8fda
diff --git a/libc/include/paths.h b/libc/include/paths.h
index dc1c523..b5b8610 100644
--- a/libc/include/paths.h
+++ b/libc/include/paths.h
@@ -47,7 +47,7 @@
 #define _PATH_CONSOLE "/dev/console"
 
 /** Default shell search path. */
-#define _PATH_DEFPATH "/sbin:/system/sbin:/system/bin:/system/xbin:/odm/bin:/vendor/bin:/vendor/xbin"
+#define _PATH_DEFPATH "/sbin:/system/sbin:/apex/com.android.runtime/bin:/system/bin:/system/xbin:/odm/bin:/vendor/bin:/vendor/xbin"
 
 /** Path to the directory containing device files. */
 #define _PATH_DEV "/dev/"