Always deliver toolType from toolkit to IME

In [1] we incorrectly disallowed toolkit to send editor tooltype to IME.
This CL reinstates that so both HandwritingModeController and toolkit
could keep IME up-to-date with editor toolType.

[1]: I86952bc6591c9f6d29ab2dc94027d4903db6a762

Bug: 298149197
Test: atest StylusHandwritingTest
Change-Id: I7c2d658b4954690dc9a764ff7042fb51cdedca1e