Implement hourglass cursor on Android

* lisp/term/android-win.el (x-pointer-arrow, x-pointer-left-ptr)
(x-pointer-left-side, x-pointer-sb-h-double-arrow)
(x-pointer-sb-v-double-arrow, x-pointer-watch, x-pointer-xterm)
(x-pointer-invisible): New constants.
* src/androidterm.c (android_show_hourglass)
(android_hide_hourglass): New functions.
(android_toggle_visible_pointer, android_define_frame_cursor):
Define or don't define hourglass cursor if x->hourglass.
(android_redisplay_interface): Add new functions.
* src/androidterm.h (struct android_output): New field
`hourglass'.

1 files changed, 3 insertions, 0 deletions

diff --git a/src/androidterm.h b/src/androidterm.h
index 2e59365b56d..9396d5fe315 100644
--- a/src/androidterm.h
+++ b/src/androidterm.h
@@ -209,6 +209,9 @@ struct android_output
   Emacs_Cursor bottom_edge_cursor;
   Emacs_Cursor bottom_left_corner_cursor;
 
+  /* Whether or not the hourglass cursor is being displayed.  */
+  bool hourglass;
+
   /* This is the Emacs structure for the display this frame is on.  */
   struct android_display_info *display_info;