srand() and its friends are supposed to be discouraged since C++14.
This CL replaces srand() with new C++11 random libraries.
Change-Id: If2c25158c88c674cd3fd6d891559a9e32283e19e
This CL adds an initial native test that runs on host
environment, from which we can extend the coverage of native
test.
BUG: 13754552
Change-Id: I0af9d1b5dd049c83b955f5b05add4b39f3cfcc6c