simpleperf: Add --decode-etm in the record cmd

When used, simpleperf decodes etm data while recording.

Bug: 279094308
Test: run simpleperf_unit_test
(cherry picked from https://android-review.googlesource.com/q/commit:290e9c4ed8f7547780a364626de95284ca946a07)

Merged-In: I13dac6ec298c3731aac5428e88f41997f9a922d8
Change-Id: I13dac6ec298c3731aac5428e88f41997f9a922d8
9 files changed