No service timeout when debbuger is attached

Don't trigger service timeout when debbuger is attached.
Also do not kill the process for isSilentAnr when app is under debugging.

Fix: 130307879
Test: Set a breakpoint in app's Service.onCreate(), debug the app, start
the service and hit the breakpoint. Make sure there is no ANR from the
service timeout.

Change-Id: I32075543fb864869c2719c3c022681a9a2318a60