ee56d93454
[ Merge of http://go/wvgerrit/84607 ] [ Merge of http://go/wvgerrit/84608 ] The primary goal is to replace the use of `rand()` with the random number generators provided with the C++11 standard. This simplified generator wraps some of the technical aspects of the <random> library and provides an interface for uniformly distributed integers. As part of the `rand()` purge in the CDM, all uses of the C random int function in `core()` have been removed. Places that previously used `rand()` now use `CdmRandom` facilities. Test: Linux unittest and Android unittest Bug: 130680365 Change-Id: Ica383870536ed462dbb80e630c2d66845e38b937