Before the suggestion selection were notified only when they were added by
an IME. This CL relaxes this constrain, and the suggestion are notified
even if they are added by an application.
If the context is null and the package name of the apk cannot be determined,
the suggestion are notified using the old method via the Input Method Manager.
This is required to keep the backward compatibility.
Bug: 6905960
Change-Id: If225ef27cded386809fbd899e34e32aced4e0473
0c96b81f8e