Update framework-base-testutils to use new mockito

Update framework-base-testutils to use
mockito-target-extended-minus-junit4 instead of
mockito-target-minus-junit4 to allow tests to take advantage of the new
static and final method mocking capabilities.

Bug: 187755981
Test: build
Change-Id: Ie0e4da02b7263cb6a89d91aeaa7230f3e932c4f2