Housekeeping around androidselect.c

Housekeeping around androidselect.c

* java/org/gnu/emacs/EmacsClipboard.java (setClipboard)
(getClipboard):

* java/org/gnu/emacs/EmacsSdk11Clipboard.java (setClipboard)
(getClipboard):

* java/org/gnu/emacs/EmacsSdk8Clipboard.java (setClipboard)
(getClipboard): Save and return Strings rather than byte arrays.

* src/androidselect.c (android_init_emacs_clipboard)
(Fandroid_set_clipboard, Fandroid_get_clipboard): Adjust to
match.