Improve compression of Emacs packages on Android 2.2

Improve compression of Emacs packages on Android 2.2

* configure.ac (ZIP): Search for a `zip' executable and
substitute the same if targeting SDK 8.

* java/INSTALL: Document new requirement.

* java/Makefile.in (GZIP_PROG, ZIP): New substitutions.
(.PHONY): Delete references to directory-tree.

(install_temp): On SDK 8 and earlier, compress large *.el and
Info files with gzip, and divide install_temp into three
separate directories, with one for large files, another for
gzipped files, and one more for the remainder.
(install_temp/assets/directory-tree, install_temp/assets/version)
(install_temp/assets/build_info): Merge these rules into
install_tmp, that they may execute before the assets directory
is split.
(emacs.apk-in): Package each directory separately, accounting
for their varied compression requirements.

* lisp/term/android-win.el (input-decode-map): Define select to
return in input-decode-map.

(cherry picked from commit 5fc75b051fc623a4f614a7abe09f08d127ed9ccd)