Fix import order with isort tool.

tools/telemetry/telemetry/core/platform/mac_platform_backend.py

Index: tools/telemetry/telemetry/core/platform/mac_platform_backend.py
diff --git a/tools/telemetry/telemetry/core/platform/mac_platform_backend.py b/tools/telemetry/telemetry/core/platform/mac_platform_backend.py
index c83f5a754909366ba3ef13f8f1aeffda9ff2e037..1823483406064106f1870b2d00b8f1fdb1339b7d 100644
--- a/tools/telemetry/telemetry/core/platform/mac_platform_backend.py
+++ b/tools/telemetry/telemetry/core/platform/mac_platform_backend.py
@@ -5,16 +5,18 @@
 import ctypes
 import os
 import time
-try:
-  import resource  # pylint: disable=F0401
-except ImportError:
-  resource = None  # Not available on all platforms
 
 from telemetry import decorators
 from telemetry.core.platform import platform_backend
 from telemetry.core.platform import posix_platform_backend
 from telemetry.core.platform.power_monitor import powermetrics_power_monitor
 
+try:
+  import resource  # pylint: disable=F0401
+except ImportError:
+  resource = None  # Not available on all platforms
+
+
 
 class MacPlatformBackend(posix_platform_backend.PosixPlatformBackend):
   def __init__(self):