[Startup Tracing][Telemetry] Move tracing_options and tracing_category_filter

tools/perf/measurements/v8_gc_times.py

 # Copyright 2015 The Chromium Authors. All rights reserved.
 # Use of this source code is governed by a BSD-style license that can be
 # found in the LICENSE file.
 
-from telemetry.core.platform import tracing_category_filter
-from telemetry.core.platform import tracing_options
 from telemetry.page import page_test
 from telemetry.timeline.model import TimelineModel
+from telemetry.timeline import tracing_category_filter
+from telemetry.timeline import tracing_options
 from telemetry.util import statistics
 from telemetry.value import scalar
 
 
 class V8GCTimes(page_test.PageTest):
 
   _TIME_OUT_IN_SECONDS = 60
   _CATEGORIES = ['blink.console',
                  'renderer.scheduler',
                  'toplevel',
@@ skipping 168 matching lines @@
     self.idle_task_overrun_duration = 0.0
 
   @property
   def thread_duration_outside_idle(self):
     return self.thread_duration - self.thread_duration_inside_idle
 
   @property
   def percentage_thread_duration_during_idle(self):
     return statistics.DivideIfPossibleOrZero(
         100 * self.thread_duration_inside_idle, self.thread_duration)