Add public type and ID to InsetsSourceControl

This CL replaces the InternalInsetsType with the InsetsType and the ID
in InsetsSourceControl. The is a step to remove InternalInsetsType like
we did to InsetsSource.

Bug: 234093736
Test: atest ImeInsetsSourceConsumerTest InsetsAnimationControlImplTest
      InsetsControllerTest InsetsSourceConsumerTest DisplayImeControllerTest
      InsetsPolicyTest
Change-Id: I01aa4930cccf295abdc2efd9f762d035d03748ce