We rolled back the previous <unknown commit> because some of the nullness checking fixes broke the exoplayer2 tests. We submit this CL into the TAP Global Presubmit train (https://test.corp.google.com/OCL:337620582:BASE:338201100:1603283151742:36afd5a5) and make sure that this CL wouldn't break any other tests on google3.
PiperOrigin-RevId: 338267548
