Add support of trace duration for host python compiler.

The basic idea is add timestamp for MmFilemapAddToPageCache.
Treat the first receiving MmFilemapAddToPageCache timestamp as
the start time. The end time is the sum of start time and duration.
Any MmFilemapAddToPageCache after end time is filtered out.

Test: pytest trace2db_test.py
Bug: 137398235
Change-Id: Ib9c439f3ae0ca666eacb08492361217d89adec34