Log package parse timings

Log time it takes to parse a package (parse=) and update the cache
(update_cache=), if time exceeds 100ms threshold.

This can be useful for analyzing bugreports of slow PM init post-OTA.

Test: manual
Bug: 62462279
Change-Id: I4099b21fae6a5db8c8f1cbc2147a33b9ee51767a