Add ConfigVerifier tool to help validate node values

Bug: 72316046
Test: su system ./perfmgr_config_verifier -c /vendor/etc/powerhint.json -v

(cherry picked from commit ac215bbc5d03f255d8305c2cda15bf8f7ba3930f)

Change-Id: If7f2238b0fb50e764f4e97e05cb2f0d5f8afd970
5 files changed