Perfprofd: Add support for sampling frequency

Allow sampling frequency (-f) besides sampling period (-c), and
support simpleperf default values (when neither is set).

(cherry picked from commit e4b2ed98a9a4a35ac4bb46c20b1599e0889eb3a3)

Bug: 73175642
Test: mmma system/extras/perfprofd
Test: perfprofd_test
Merged-In: I40d7472bc45f5efd33687f9d8a5d6493343091c3
Change-Id: I40d7472bc45f5efd33687f9d8a5d6493343091c3
4 files changed