Remove use of internal Trace method.

android.os.Trace is not a proper API; remove use of these references from
Telecom to remove references to hidden APIs.

The delta looks strange because I had to remove the try/finally and that
made the indentation change.

Fixes: 307786578
Test: Compile; run unit/cts tests.
Flag: EXEMPT bugfix; removes non-impacting code.
Change-Id: Ib31a47a71efaba62905cd18336967d2890b1e177