Implement inline suggestion tooltip

In the InlineSuggestionFactory, it will filter the tooltips by the
field let only the first one can pass to the IME and drop others.
When the IME inflates the inline suggestion, if there is a tooltip of
the suggestion view, inflates the tooltip view at the same time. It
will create the InlineTooltipUi that will be a popup window and
contains the surface view of the tooltip.

Bug: 172024354
Test: atest CtsAutoFillServiceTestCases:InlineTooltipTest
Change-Id: I6f20dcad6d03432017e684964eca52dff2609205