[telemetry] Tenatively re-enable IPPET.

We want to see if it continues to cause flake and noise on the bots. If so, feel free to revert.

BUG=336558
TEST=None.
R=tonyg

Review URL: https://codereview.chromium.org/510143003

Cr-Commit-Position: refs/heads/master@{#292253}

tools/telemetry/telemetry/core/platform/power_monitor/ippet_power_monitor.py

@@ -73,10 +73,6 @@ class IppetPowerMonitor(power_monitor.PowerMonitor):
     self._output_dir = None
 
   def CanMonitorPower(self):
-    # IPPET disabled because of flakiness (crbug.com/336558).
-    if True:
-      return False
-
     if not win32event:
       return False