EffectHal: Support retrieving worker thread tid

Use 'gtid' as the command, returns the worker
thread tid.

Test: see bug
Bug: 253276925
Change-Id: Ia4fa129c62cf6df97821c34876b517944bc5322f
(cherry picked from commit 7d5eb5c8371cd881d8d2fd7b57a6d2803206fd59)
Merged-In: Ia4fa129c62cf6df97821c34876b517944bc5322f
1 file changed