Rename busy level updates to inquiry status updates

Now that we've cleaned up the function, it's true purpose has been
unmasked.

It would have gotten away with it too, if it weren't for these
meddling kids.

Bug: 159815595
Tag: #refactor
Test: compile & verify basic functions working
Change-Id: I04eab90be8bb9fda32143230a923c987a7e9a9a1