Avoid responding to input method queries asynchronously

Avoid responding to input method queries asynchronously

* src/androidterm.c (handle_one_android_event): Don't answer
queries here; just rely on the event interrupting
android_select.  This avoids exposing buffer contents to input
methods while a command is being executed.
* src/textconv.c (TEXTCONV_DEBUG, really_commit_text)
(really_finish_composing_text, really_set_composing_text)
(really_set_composing_region, really_delete_surrounding_text)
(really_set_point_and_mark, get_extracted_text): Add debugging
printouts.