SDK / exoplayer

*** Reason for rollback ***

Breaks ExoPlayer's gradle build

*** Original change description ***

Migrate Mockito Matchers.{hamcrestMethods} to MockitoHamcrest.{hamcrestMethods}

All methods accepting a hamcrest Matcher in org.mockito.Matchers have been changed
to only accept an ArgumentMatcher. The corresponding methods are now available on
MockitoHamcrest.

For more information see http://go/mockito-2-lsc

Tested:
    TAP --sample for global presubmit queue
    http://test/OCL:235033293:BASE:234998256:1550793421835:c2ccbbda

***

PiperOrigin-RevId: 235186705