Updated docs with clarifications on specific limitations with the new

Inline APIs.

* limitations with multiple locales.
* limit on max number of suggestions.
* guidance on managing the order of inline suggestions when inflating.

Fixes: 161486684
Test: atest android.autofillservice.cts.inline
Change-Id: Ia560d48f95730d79bc340ff9eb0cf4a5909bf0d3