Update Android port

Update Android port

* java/org/gnu/emacs/EmacsActivity.java (EmacsActivity)
(onCreate): Add view tree observer.
(onGlobalLayout): Sync fullscreen state.
(syncFullscreenWith): Improve visibility flag setting.

* src/textconv.c (select_window): New function.
(textconv_query):
(restore_selected_window):
(really_commit_text):
(really_set_composing_text):
(really_set_composing_region):
(really_delete_surrounding_text):
(really_set_point_and_mark):
(get_extracted_text): Call it instead of Fselect_window
to avoid selecting the mini window if it is no longer active.