Use Mockito 4.6.1 API

Bug: 236636175
Test: m ThemePickerRoboTests
Change-Id: Ia1d57375170cd8b0c33f3685b2dc3ef0c52ab117
(cherry picked from commit 0ad99b54454168b4051c2975c9bd92bb73d8284d)
Merged-In: Ia1d57375170cd8b0c33f3685b2dc3ef0c52ab117
2 files changed