tree a7b3ef44f1c30b5106aa525c6a30e48916ccde2f
parent 3d16d16a94667bd4c46eb06a0eeae63f87aa31d6
author Carmen Jackson <carmenjackson@google.com> 1561483374 -0700
committer Carmen Jackson <carmenjackson@google.com> 1561567879 -0700

Only query Perfetto state at boot when necessary.

When we update the tracing state, we check both:
- Whether the user has enabled tracing
- Whether a trace is currently in progress

And then update the two to match.

In order to check whether a trace is currently in progress, we need to
start the Perfetto process and query it. We know that Perfetto will not
automatically start a Traceur trace at boot by itself, so we can skip
this query at boot time and assume it'll return false.

Since the system is under so much load at boot, this query was
occasionally causing Traceur to ANR, so it's worthwhile to skip it when
possible.

Bug: 135610481
Test: atest TraceurUiTests & manual testing

Merged-In: Ie29ab6cc7f2f993bd6a0f33c44dc99410ccf95e8
Change-Id: Ie29ab6cc7f2f993bd6a0f33c44dc99410ccf95e8