Fix a string uint conversion bug in profiler

This CL fixes a potential string to uint32_t conversion bug caused by
using atoi. The bug can be trigger when the dex_pc or count pass
2^31 - 1. The CL replaces all string uint32_t conversions in profiler to

Change-Id: I54f1aea9c5f5053d79813ea83050ace3749691d6
1 file changed