Untangle listeners mess in IncrementalService

Listeners and some binder call parameters were using several
different styles when passed around - copy, move, pointer,
pointer to pointer. This CL tries to 'normalize' that.

Bug: 183067554
Test: atest IncrementalServiceTest
Change-Id: Ia28089aa9e4491b0f28e3e747489199cfccb5a1b