stopwatch: improve stopwatch problems

* For command timeout case, will print the stopwatch log.
* For startup_timer_expired case, will print the stopwatch log.
* Add record initializationComplete function into stopwatch log.
* For the stopwatch can't correctly dump log if the array is not full
  case, fix it.

bug: 190786398
Test: atest BluetoothInstrumentationTests & Manually
Tag: #stability
Change-Id: I8a66897ca46f593e18e231c43e8873ff0db08288
Merged-In: Ie59dbc0bd2f574761eed7aac695cbff07948d8e2