Split up ti-agent/common_helper.cc

This file has gotten far too large. Split it up into pieces for each
of the major JVMTI helper classes (art.Breakpoint, art.Trace, &
art.Redefinition).

Test: ./test.py --host -j40
Change-Id: Ia0697c212983706aadeb3c4eaa575a6abcf7a825
7 files changed