Adjust imports following telemetry.core refactoring

https://codereview.chromium.org/1219083002 moved webpagereplay from
telemetry.core to telemetry.internal.util, and extension_to_load from
telemetry.core to telemetry.internal.browser.

BUG=498968
NOTRY=true
NOTREECHECKS=true
TBR=aiolos@chromium.org,xiyuan@chromium.org

Review URL: https://codereview.chromium.org/1217643003

Cr-Commit-Position: refs/heads/master@{#337205}

components/proximity_auth/e2e_test/cros.py

@@ -17,10 +17,10 @@
 
 from telemetry.core import browser_options
 from telemetry.core import browser_finder
-from telemetry.core import extension_to_load
 from telemetry.core import exceptions
 from telemetry.core import util
 from telemetry.core.platform import cros_interface
+from telemetry.internal.browser import extension_to_load
 
 logger = logging.getLogger('proximity_auth.%s' % __name__)
 

tools/cygprofile/profile_android_startup.py

@@ -26,7 +26,7 @@
 from pylib.device import intent
 
 sys.path.append(os.path.join(sys.path[0], '..', '..', 'tools', 'telemetry'))
-from telemetry.core import webpagereplay
+from telemetry.internal.util import webpagereplay
 
 sys.path.append(os.path.join(sys.path[0], '..', '..',
     'third_party', 'webpagereplay'))