[Android] Add --blacklist-file as a command-line option.

tools/telemetry/telemetry/internal/browser/browser_options.py

Index: tools/telemetry/telemetry/internal/browser/browser_options.py
diff --git a/tools/telemetry/telemetry/internal/browser/browser_options.py b/tools/telemetry/telemetry/internal/browser/browser_options.py
index e27f043afa055d624c54c0157aa34e661e34d28c..22c4c230bfd33214cfc9cbd39f7d4cc546e7bcb7 100644
--- a/tools/telemetry/telemetry/internal/browser/browser_options.py
+++ b/tools/telemetry/telemetry/internal/browser/browser_options.py
@@ -136,6 +136,8 @@ class BrowserFinderOptions(optparse.Values):
     group.add_option('--no-android-rndis', dest='android_rndis',
         action='store_false', help='Do not use RNDIS forwarding on Android.'
         ' [default]')
+    group.add_option('--android-blacklist-file',
+                     help='Device blacklist JSON file.')
     parser.add_option_group(group)
 
     # Browser options.