Refactored surfaceflinger_frametracer_fuzzer

The following are the updates to the fuzzer:
1. Randomized APIs
2. Randomized 'signalTime' parameter
3. Coverage improved from 62% to 85%

Test: ./surfaceflinger_frametracer_fuzzer
Bug: 302634417
exec/s: 500

Change-Id: I920dce897d2834cb1f156c39c82c358a0ceb8699
1 file changed