[Android] Build android tools as PIE and add a wrapper for ICS

tools/telemetry/telemetry/core/platform/android_platform_backend.py

 # Copyright (c) 2013 The Chromium Authors. All rights reserved.
 # Use of this source code is governed by a BSD-style license that can be
 # found in the LICENSE file.
 
 import logging
 import subprocess
 import tempfile
 
 from telemetry import decorators
 from telemetry.core import bitmap
@@ skipping 109 matching lines @@
     return super(AndroidPlatformBackend, self).GetCpuTimestamp()
 
   def PurgeUnpinnedMemory(self):
     """Purges the unpinned ashmem memory for the whole system.
 
     This can be used to make memory measurements more stable in particular.
     """
     if not android_prebuilt_profiler_helper.InstallOnDevice(
         self._device, 'purge_ashmem'):
       raise Exception('Error installing purge_ashmem.')
-    if self._device.old_interface.RunShellCommand(
+    (status, output) = self._device.old_interface.GetAndroidToolStatusAndOutput(
         android_prebuilt_profiler_helper.GetDevicePath('purge_ashmem'),
-        log_result=True):
-      return
-    raise Exception('Error while purging ashmem.')
+        log_result=True)
+    if status != 0:
+      raise Exception('Error while purging ashmem: ' + '\n'.join(output))
 
   def GetMemoryStats(self, pid):
     memory_usage = self._device.old_interface.GetMemoryUsageForPid(pid)
     return {'ProportionalSetSize': memory_usage['Pss'] * 1024,
             'SharedDirty': memory_usage['Shared_Dirty'] * 1024,
             'PrivateDirty': memory_usage['Private_Dirty'] * 1024,
             'VMPeak': memory_usage['VmHWM'] * 1024}
 
   def GetIOStats(self, pid):
     return {}
@@ skipping 178 matching lines @@
     output = []
     for line in ps:
       data = line.split()
       curr_pid = data[1]
       curr_name = data[-1]
       if columns == ['pid', 'name']:
         output.append([curr_pid, curr_name])
       else:
         output.append([curr_pid])
     return output