Allow traced_probes to access power rail data.

Allows power rail data to be logged in the trace, allowing
high fidelity attribution of battery power use.

Matching feature CL: aosp/891533

SELinux denials that lead to this:
avc: denied { call } for scontext=u:r:traced_probes:s0 tcontext=u:r:hal_power_stats_default:s0 tclass=binder

Test: checked data in a trace
Bug: 122584217

Change-Id: I7e0f4e825be3f54bc78d91da1cb85c2f61465a44
1 file changed