Update Android port

Update Android port

* configure.ac (HAVE_TEXT_CONVERSION): Define on Android.
* doc/emacs/input.texi (On-Screen Keyboards): Document ``text
conversion'' slightly.
* doc/lispref/commands.texi (Misc Events): Document new
`text-conversion' event.
* java/org/gnu/emacs/EmacsContextMenu.java (display): Use
`syncRunnable'.
* java/org/gnu/emacs/EmacsDialog.java (display): Likewise.
* java/org/gnu/emacs/EmacsEditable.java: Delete file.
* java/org/gnu/emacs/EmacsInputConnection.java
(EmacsInputConnection): Reimplement from scratch.
* java/org/gnu/emacs/EmacsNative.java (EmacsNative): Add new
functions.
* java/org/gnu/emacs/EmacsService.java (EmacsService, getEmacsView)
(getLocationOnScreen, sync, getClipboardManager, restartEmacs):
Use syncRunnable.
(syncRunnable): New function.
(updateIC, resetIC): New functions.

* java/org/gnu/emacs/EmacsView.java (EmacsView): New field
`inputConnection' and `icMode'.
(onCreateInputConnection): Update accordingly.
(setICMode, getICMode): New functions.

* lisp/bindings.el (global-map): Ignore text conversion events.
* src/alloc.c (mark_frame): Mark text conversion data.
* src/android.c (struct android_emacs_service): New fields
`update_ic' and `reset_ic'.
(event_serial): Export.
(android_query_sem): New function.
(android_init_events): Initialize new semaphore.
(android_write_event): Export.
(android_select): Check for UI thread code.
(setEmacsParams, android_init_emacs_service): Initialize new
methods.
(android_check_query, android_begin_query, android_end_query)
(android_run_in_emacs_thread):
(android_update_ic, android_reset_ic): New functions for
managing synchronous queries from one thread to another.

* src/android.h: Export new functions.
* src/androidgui.h (enum android_event_type): Add input method
events.
(enum android_ime_operation, struct android_ime_event)
(union android_event, enum android_ic_mode): New structs and
enums.

* src/androidterm.c (android_window_to_frame): Allow DPYINFO to
be NULL.
(android_decode_utf16, android_handle_ime_event)
(handle_one_android_event, android_sync_edit)
(android_copy_java_string, beginBatchEdit, endBatchEdit)
(commitCompletion, deleteSurroundingText, finishComposingText)
(getSelectedtext, getTextAfterCursor, getTextBeforeCursor)
(setComposingText, setComposingRegion, setSelection, getSelection)
(performEditorAction, getExtractedText): New functions.
(struct android_conversion_query_context):
(android_perform_conversion_query):
(android_text_to_string):
(struct android_get_selection_context):
(android_get_selection):
(struct android_get_extracted_text_context):
(android_get_extracted_text):
(struct android_extracted_text_request_class):
(struct android_extracted_text_class):
(android_update_selection):
(android_reset_conversion):
(android_set_point):
(android_compose_region_changed):
(android_notify_conversion):
(text_conversion_interface): New functions and structures.
(android_term_init): Initialize text conversion.

* src/coding.c (syms_of_coding): Define Qutf_16le on Android.
* src/frame.c (make_frame): Clear conversion data.
(delete_frame): Reset conversion state.

* src/frame.h (enum text_conversion_operation)
(struct text_conversion_action, struct text_conversion_state)
(GCALIGNED_STRUCT): Update structures.
* src/keyboard.c (read_char, readable_events, kbd_buffer_get_event)
(syms_of_keyboard): Handle text conversion events.
* src/lisp.h:
* src/process.c: Fix includes.

* src/textconv.c (enum textconv_batch_edit_flags, textconv_query)
(reset_frame_state, detect_conversion_events)
(restore_selected_window, really_commit_text)
(really_finish_composing_text, really_set_composing_text)
(really_set_composing_region, really_delete_surrounding_text)
(really_set_point, complete_edit)
(handle_pending_conversion_events_1)
(handle_pending_conversion_events, start_batch_edit)
(end_batch_edit, commit_text, finish_composing_text)
(set_composing_text, set_composing_region, textconv_set_point)
(delete_surrounding_text, get_extracted_text)
(report_selected_window_change, report_point_change)
(register_texconv_interface): New functions.

* src/textconv.h (struct textconv_interface)
(TEXTCONV_SKIP_CONVERSION_REGION): Update prototype.
* src/xdisp.c (mark_window_display_accurate_1):
* src/xfns.c (xic_string_conversion_callback):
* src/xterm.c (init_xterm): Adjust accordingly.