Update android device provisioning script to set some reliability settings.

build/android/provision_devices.py

Index: build/android/provision_devices.py
diff --git a/build/android/provision_devices.py b/build/android/provision_devices.py
index a3922469c8e765a221e055635483a6ecf9fc254b..456744408b60eb809cbf15492e54ef4352a12fe9 100755
--- a/build/android/provision_devices.py
+++ b/build/android/provision_devices.py
@@ -19,6 +19,8 @@ import time
 
 from pylib import android_commands
 from pylib import constants
+from pylib import device_settings
+
 
 def KillHostHeartbeat():
   ps = subprocess.Popen(['ps', 'aux'], stdout = subprocess.PIPE)
@@ -65,6 +67,19 @@ def PushAndLaunchAdbReboot(devices, target):
   LaunchHostHeartbeat()
 
 
+def _ConfigureLocalProperties(adb):
+  """Set standard readonly testing device properties prior to reboot."""
+  local_props = ['ro.monkey=1',

[bulach, 2014/02/26 15:23:59]

ultra nit: perhaps:
local_props = [
  ...,
  ...,
]

[tonyg, 2014/02/26 16:52:58]

Done.

+                 'ro.test_harness=1',
+                 'ro.audio.silent=1',
+                 'ro.setupwizard.mode=DISABLED']
+  adb.SetProtectedFileContents(android_commands.LOCAL_PROPERTIES_PATH,
+                               '\n'.join(local_props))
+  # Android will not respect the local props file if it is world writable.
+  adb.RunShellCommandWithSU('chmod 644 %s' %
+                            android_commands.LOCAL_PROPERTIES_PATH)
+
+
 def ProvisionDevices(options):
   if options.device is not None:
     devices = [options.device]
@@ -72,6 +87,14 @@ def ProvisionDevices(options):
     devices = android_commands.GetAttachedDevices()
   for device in devices:
     android_cmd = android_commands.AndroidCommands(device)
+    _ConfigureLocalProperties(android_cmd)
+    device_settings.ConfigureContentSettingsDict(
+        android_cmd, device_settings.DETERMINISTIC_DEVICE_SETTINGS)
+    # TODO(tonyg): We eventually want network on. However, currently radios
+    # can cause perfbots to drain faster than they charge.
+    if 'Perf' in os.environ.get('BUILDBOT_BUILDERNAME', ''):

[bulach, 2014/02/26 15:23:59]

nit: s/Perf/ and use a .lower()
so this would work downstream too ;)
(and yes, we should eventually converge those names, but anyways..).

[tonyg, 2014/02/26 16:52:58]

Done.

+      device_settings.ConfigureContentSettingsDict(
+          android_cmd, device_settings.NETWORK_DISABLED_SETTINGS)
     android_cmd.RunShellCommandWithSU('date -u %f' % time.time())
   if options.auto_reconnect:
     PushAndLaunchAdbReboot(devices, options.target)