Update profiling code for host-side tests.

* Parse profiling data for each test case.
* Merge the profiling data for each test case at the end of test
  and upload the profiling info to web.

Bug:34226555
Test: run vts -m VibratorHidlProfilingTest

Change-Id: I9e13eada8e7db338a29c6943868d12e76844e2c4
4 files changed