Summary: Update Android port

Summary: Update Android port

* INSTALL: Document where to find Android installation
instructions.
* configure.ac (CHECK_LISP_OBJECT_TYPE): Pacify
-Wsuggest-attribute=noreturn only on Android.
* cross/ndk-build/README: New file.
* doc/emacs/android.texi (Android):
* doc/emacs/emacs.texi (Top):
* doc/emacs/input.texi (Other Input Devices): Untabify menus.
* etc/NEWS: Move INSTALL.android to java/INSTALL.
* java/INSTALL: New file.
* java/README:
* src/coding.c (from_unicode_buffer): Make Android specific code
only build on Android.