Implement android_copy_area in C

* java/org/gnu/emacs/EmacsCopyArea.java: Remove file.
* java/org/gnu/emacs/EmacsService.java (EmacsService, copyArea):
Delete function.
* src/android.c (struct android_emacs_service)
(android_init_emacs_service): Remove `copy_area'.
(android_create_gc, android_change_gc, android_get_gc_values):
Record new GC values.
(android_neon_mask_line): New function.
(android_blit_copy, android_blit_xor): New functions.
(android_copy_area): Implement in C.
(android_lock_bitmap): Accept drawables instead of windows.
* src/android.h: Adjust prototype for `android_lock_bitmap'.
* src/androidgui.h (struct android_gc): Record last known GC
values.

java/org/gnu/emacs/EmacsService.java

@@ -374,18 +374,6 @@ public final class EmacsService extends Service
     EmacsDrawPoint.perform (drawable, gc, x, y);
   }
 
-  public void
-  copyArea (EmacsDrawable srcDrawable, EmacsDrawable dstDrawable,
-	    EmacsGC gc,
-	    int srcX, int srcY, int width, int height, int destX,
-	    int destY)
-  {
-    checkEmacsThread ();
-    EmacsCopyArea.perform (srcDrawable, gc, dstDrawable,
-			   srcX, srcY, width, height, destX,
-			   destY);
-  }
-
   public void
   clearWindow (EmacsWindow window)
   {