Update Android port

Update Android port

* java/org/gnu/emacs/EmacsInputConnection.java
(EmacsInputConnection): Apply workarounds on Vivo devices as
well.
* src/android.c (sendKeyPress, sendKeyRelease): Clear counter.
* src/androidgui.h (struct android_key_event): New field
`counter'.
* src/androidterm.c (handle_one_android_event): Generate
barriers as appropriate.
(JNICALL): Set `counter'.
* src/frame.h (enum text_conversion_operation):
* src/textconv.c (detect_conversion_events)
(really_set_composing_text, handle_pending_conversion_events_1)
(handle_pending_conversion_events, textconv_barrier):
* src/textconv.h: Implement text conversion barriers and fix
various typos.