Make adbconnection start automatically for debuggable apps (on target)

With wrap.sh it is required that apps that wish to be debuggable
declare that explicitly by adding the '-Xcompiler-option --debuggable'
options. When we switched to the new debugger implementation we
accidentally added a requirement that you pass
-XjdwpProvider:adbconnection. This removes that requirement and
returns to the earlier state.

Bug: 109505014
Test: Build program with wrap.sh that adds -Xcompiler-option --debuggable
      Attach debugger to program.
Change-Id: I9416ed3b156776439f5bfec032fee3f11fe4eb3c