Revert of [Android] Remove adb_commands from telemetry.

tools/telemetry/telemetry/core/backends/chrome/android_browser_finder.py

Index: tools/telemetry/telemetry/core/backends/chrome/android_browser_finder.py
diff --git a/tools/telemetry/telemetry/core/backends/chrome/android_browser_finder.py b/tools/telemetry/telemetry/core/backends/chrome/android_browser_finder.py
index 8091cd0e58317fd54a77dd238f8e3ec998f2e4c4..d4402a4eed3ee02f1bb3e7bdc3f0dea296f01293 100644
--- a/tools/telemetry/telemetry/core/backends/chrome/android_browser_finder.py
+++ b/tools/telemetry/telemetry/core/backends/chrome/android_browser_finder.py
@@ -7,6 +7,7 @@
 import logging
 import os
 
+from telemetry.core.backends import adb_commands
 from telemetry.core.backends import android_browser_backend_settings
 from telemetry.core.backends.chrome import android_browser_backend
 from telemetry.core import browser
@@ -16,9 +17,6 @@
 from telemetry.core import possible_browser
 from telemetry.core import util
 from telemetry import decorators
-
-util.AddDirToPythonPath(util.GetChromiumSrcDir(), 'build', 'android')
-from pylib.utils import apk_helper # pylint: disable=import-error
 
 
 CHROME_PACKAGE_NAMES = {
@@ -172,7 +170,7 @@
       CanPossiblyHandlePath(finder_options.browser_executable)):
     normalized_path = os.path.expanduser(finder_options.browser_executable)
 
-    exact_package = apk_helper.GetPackageName(normalized_path)
+    exact_package = adb_commands.GetPackageName(normalized_path)
     if not exact_package:
       raise exceptions.PackageDetectionError(
           'Unable to find package for %s specified by --browser-executable' %