tree acc3a55ec97c42678f59cb0568b5d1cfad3664af
parent 419ba9e2aadbfed3862d95265ce141d016c7ca69
author Elliott Hughes <enh@google.com> 1524693170 -0700
committer Elliott Hughes <enh@google.com> 1524693348 -0700

Rewrite get_sched_policy_name for safety.

This way you'll get a build time error if you make the usual mistake of
adding to the enum but not adding an entry to the array.

Also improve the unit tests, and fix get_sched_policy_name's incorrect
behavior on invalid inputs.

Bug: N/A
Test: ran tests
Change-Id: Iefcb1ec9ef66267837da7a576c8be3d0cfb16cd0