[BattOr] Add ability to platform object to detect BattOrs.

telemetry/telemetry/internal/platform/android_platform_backend.py

Index: telemetry/telemetry/internal/platform/android_platform_backend.py
diff --git a/telemetry/telemetry/internal/platform/android_platform_backend.py b/telemetry/telemetry/internal/platform/android_platform_backend.py
index 2d3b993466fc287a667758958b66a7b3c6c51f0d..2f037b8ee02b588c972d8dda3a03d94c1b641676 100644
--- a/telemetry/telemetry/internal/platform/android_platform_backend.py
+++ b/telemetry/telemetry/internal/platform/android_platform_backend.py
@@ -8,6 +8,7 @@ import re
 import subprocess
 import tempfile
 
+from battor import battor_wrapper
 from telemetry.core import android_platform
 from telemetry.core import exceptions
 from telemetry.core import util
@@ -733,6 +734,12 @@ class AndroidPlatformBackend(
                                                  check_return=True)
     return self._IsScreenLocked(input_methods)
 
+  def HasBattOrConnected(self):
+    # str(self.device) is the device id as a string.
+    return battor_wrapper.IsBattOrConnected(self.GetOSName(),
+                                            android_device=str(self.device))
+
+
 def _FixPossibleAdbInstability():
   """Host side workaround for crbug.com/268450 (adb instability).