Implement torq simpleperf symbolization validation

Add logic to check for and download device symbols, and to check for
simpleperf scripts. This logic will be used in a subsequent CL to
process the simpleperf traces. Add tests for this logic.

Test: atest validate_simpleperf_unit_test
Test: atest torq_unit_test
Bug: 365985190
Change-Id: Ie4eeb655acf457e1028a3bef256cd68a15e6b027
6 files changed