[Android] Switch to DeviceUtils versions of GetPid, TakeScreenshot, and GetIoStats.

build/android/screenshot.py

Index: build/android/screenshot.py
diff --git a/build/android/screenshot.py b/build/android/screenshot.py
index a91bafd1d3264df72d8cc739ad7e7bcd79774329..fb1aee1d985aaedef0c47c22605328ff4ca969bd 100755
--- a/build/android/screenshot.py
+++ b/build/android/screenshot.py
@@ -21,7 +21,7 @@ def _PrintMessage(heading, eol='\n'):
 
 
 def _CaptureScreenshot(device, host_file):
-  host_file = device.old_interface.TakeScreenshot(host_file)
+  host_file = device.TakeScreenshot(host_file)
   _PrintMessage('Screenshot written to %s' % os.path.abspath(host_file))
 
 
@@ -37,7 +37,7 @@ def _CaptureVideo(device, host_file, options):
     raw_input()
   finally:
     recorder.Stop()
-  recorder.Pull(host_file)
+  host_file = recorder.Pull(host_file)
   _PrintMessage('Video written to %s' % os.path.abspath(host_file))