Add granular profiling to every SystemServer step.

In attempt to speed up Android Boot time we need better understand parts
that are taking long time during boot phase. SystemServer accounts to
~30-40% of boot time, so profiling and monitoring it should help
identify problematic parts.

Along with systrace logcat messages were added to simplify on the glance
check of boot process timing without the need to collect systrace.

Change-Id: Ice203eb3e6aa662d1a7cefc8bcd76f372347f4a0