Correctly handle non-BMP characters in Android content file names

* lisp/term/android-win.el (android-encode-jni)
(android-decode-jni, android-jni): New coding system, for
Android file names and runtime data.

* src/androidterm.h (syms_of_androidvfs): New function.

* src/androidvfs.c (struct android_special_vnode): New field
special_coding_system.
(android_saf_tree_readdir): Decode the file name using the
android-jni coding system.
(special_vnodes): <contents>: Specify a file name coding system.
(android_vfs_convert_name): New function.
(android_root_name): If a special coding system be specified for
a special vnode, convert components to it before invoking its
name function.
(syms_of_androidvfs): New symbol Qandroid_jni.

* src/emacs.c (android_emacs_init): Call syms_of_androidvfs.

1 files changed, 4 insertions, 1 deletions

diff --git a/src/androidterm.h b/src/androidterm.h
index ca6929bef0e..fd4cc99f641 100644
--- a/src/androidterm.h
+++ b/src/androidterm.h
@@ -461,7 +461,7 @@ extern void sfntfont_android_shrink_scanline_buffer (void);
 extern void init_sfntfont_android (void);
 extern void syms_of_sfntfont_android (void);
 
-/* Defined in androidselect.c  */
+/* Defined in androidselect.c.  */
 
 #ifndef ANDROID_STUBIFY
 
@@ -473,6 +473,9 @@ extern void android_notification_action (struct android_notification_event *,
 extern void init_androidselect (void);
 extern void syms_of_androidselect (void);
 
+/* Defined in androidvfs.c.  */
+extern void syms_of_androidvfs (void);
+
 #endif