Port visible bell to Android

* java/org/gnu/emacs/EmacsDrawRectangle.java (perform): Ignore
GC_INVERT.

* java/org/gnu/emacs/EmacsFillRectangle.java
(EmacsFillRectangle) <invertFilter>: New variable.
(perform): If the transfer mode is invert, copy the source
to itself with invertFilter as the color filter.

* java/org/gnu/emacs/EmacsGC.java (EmacsGC) <xorAlu, srcInAlu>:
Delete now-redundant ALUs.
(markDirty): Cease updating the paint's transfermode.

* java/org/gnu/emacs/EmacsSafThread.java (openDocument1): Fix
typo in documentation.

* src/android.c (android_blit_xor): Delete unused function.
(android_copy_area): Remove calls to unused blit functions.

* src/androidgui.h (enum android_gc_function): Rename XOR to
INVERT.

* src/androidterm.c (android_flash): Replace with GXinvert.

1 files changed, 1 insertions, 1 deletions

diff --git a/src/androidgui.h b/src/androidgui.h
index 5e4f6ec3989..3b3e08ca024 100644
--- a/src/androidgui.h
+++ b/src/androidgui.h
@@ -56,7 +56,7 @@ struct android_point
 enum android_gc_function
   {
     ANDROID_GC_COPY     = 0,
-    ANDROID_GC_XOR      = 1,
+    ANDROID_GC_INVERT   = 1,
   };
 
 enum android_gc_value_mask