Add accessors for Determinate Progress Bar logic

Added accessors to set progress on a determinate ProgressBar, as well as
corresponding tests.

Change-Id: I1a9dfabc2474fb74ab964364c3ec1a83b0a79f76
Fixes: 71555710
Fixes: 71591367
Test: Robolectric Tests pass
Test: Library and AAE-SUW build