Revert "Remove dependency on IME subtype from TSMS"

Since the upgrade from Android 9 to 10 spell checking
has stopped working for any language other than English.
Reverting this commit makes the spell checker recognize
the currently active input language again.

Thanks to ClearlyClaire for figuring this out.
Fixes: https://gitlab.com/LineageOS/issues/android/-/issues/1723
This reverts commit bb0a2247.

Change-Id: I3532f93d25d7ef30a3a070daaaf6d2209d4f2ec8