Fix a deadlock symptom between AM/WM

On the case,ProcessRecord.appNotResponding acquired the WMGlobalLock and waiting to
hold the AM service lock. Another thread hold the AM service lock and waiting to
acquire WMGlobalLock result in the issue.

Let the killAppCallback and serviceTimeoutCallback out of the WMGlobalLock scope.

Bug: 123173718
Test: atest ActivityStarterTests
Change-Id: I501309dc8fedbb226cd387ef6e6674a07a6d6ead