simpleperf: Add support for new perf ETE files.

With the addition of ETE, perf files have changed the format of
the AUXTRACE_INFO record. This patch adds support for the new format.
The old format is no longer supported.

Also initialize ETE decoder properly now that ETE records can be
distinguished from ETM4.

Replaced test file for unformatted_trace (ETE). Command used to record:
simpleperf record -e cs-etm:u --addr-filter "filter ./etm_test_loop" ./etm_test_loop

test: simpleperf_unit_test --gtest_filter="cmd_inject.unformatted_trace"

Change-Id: Ic48401ecd32357602056b5b4eb652a505d4aab9e
6 files changed