simpleperf: fix CanRecordRawData.

sys.init.perf_lsm_hooks isn't accessible in app context, thus
checking it in CanRecordRawData() breaks recording app with
--trace-offcpu option.

Fix it by not recording raw data in non-root users.

Bug: 153381808
Test: run simpleperf_unit_test.
Test: run test.py *TraceOffCpu*.
Change-Id: Id87c73d25b19b265c022c4fa6ebb8e7d3a84152b
(cherry picked from commit c98cb1193d73c1fa616d0d366a221751fde38f67)
1 file changed