simpleperf: profile non-debuggable apps on rooted devices.

run-as requires apps to be debuggable. But on rooted devices,
we can profile non-debuggable apps by running as root.

Bug: http://b/32834638
Test: run app_profiler.py.
Change-Id: I7cc44893fd4a67593b4f1791fb7fb4a70fd273e9
1 file changed