Fix traceEnd call for KeyAttestationApplicationIdProviderService phase
in System Server.

Change code to use traceEnd() instead
Trace.traceEnd(Trace.TRACE_TAG_SYSTEM_SERVER); to generate accurate
measurements.

Test: 1-line change. 0-risk change.
bug: 31654120
Change-Id: I24d1468ccf934dbe912822996174eb780a46994c
1 file changed