[Telemetry] Move record_wpr from telemetry/page to telemetry/

Since recording should work for all user_story, not just page.
And the logic of record_wpr should be very similar to
telemetry/benchmark_runner.py, we would want them to be a
sibling in the directory hierarchy.

BUG=470865

Review URL: https://codereview.chromium.org/1140243002

Cr-Commit-Position: refs/heads/master@{#330123}

tools/perf/record_wpr

@@ -11,7 +11,7 @@ _perf_dir = os.path.dirname(__file__)
 _telemetry_path = os.path.join(_perf_dir, os.pardir, 'telemetry')
 sys.path.append(_telemetry_path)
 
-from telemetry.page import record_wpr
+from telemetry import record_wpr
 
 if __name__ == '__main__':
   sys.exit(record_wpr.Main(_perf_dir))

tools/telemetry/telemetry/page/record_wpr_unittest.py → tools/telemetry/telemetry/record_wpr_unittest.py

@@ -6,13 +6,13 @@ import os
 import sys
 
 from telemetry import benchmark
+from telemetry import record_wpr
 from telemetry.core import util
 from telemetry.core import wpr_modes
 from telemetry import decorators
 from telemetry.page import page as page_module
 from telemetry.page import page_set as page_set_module
 from telemetry.page import page_test
-from telemetry.page import record_wpr
 from telemetry.unittest_util import tab_test_case