[Telemetry] Implement CanLaunchApplication and InstallApplication for Android.

tools/telemetry/telemetry/unittest/system_stub.py

Index: tools/telemetry/telemetry/unittest/system_stub.py
diff --git a/tools/telemetry/telemetry/unittest/system_stub.py b/tools/telemetry/telemetry/unittest/system_stub.py
index b7f1a4d07bc039e5d774cee1f08246e300d91134..94d8597fdca344859ce10ce5885e89d4885f684c 100644
--- a/tools/telemetry/telemetry/unittest/system_stub.py
+++ b/tools/telemetry/telemetry/unittest/system_stub.py
@@ -50,18 +50,40 @@ class Override(object):
     self._overrides = {}
 
 
+class AndroidCommands(object):
+
+  def CanAccessProtectedFileContents(self):
+    return False
+
+
+class AdbDevice(object):
+
+  def __init__(self, shell_command_handlers):
+    self._shell_command_handlers = shell_command_handlers
+
+  def RunShellCommand(self, args):
+    if isinstance(args, basestring):
+      args = shlex.split(args)
+    handler = self._shell_command_handlers[args[0]]
+    return handler(args)
+
+  def FileExists(self, _):
+    return False
+
+  @property
+  def old_interface(self):
+    return AndroidCommands()
+
+
 class AdbCommandsModuleStub(object):
+
   class AdbCommandsStub(object):
+
     def __init__(self, module, device):
       self._module = module
       self._device = device
       self.is_root_enabled = True
-
-    def RunShellCommand(self, args):
-      if isinstance(args, basestring):
-        args = shlex.split(args)
-      handler = self._module.shell_command_handlers[args[0]]
-      return handler(args)
+      self._adb_device = AdbDevice(module.shell_command_handlers)
 
     def IsRootEnabled(self):
       return self.is_root_enabled
@@ -75,9 +97,12 @@ class AdbCommandsModuleStub(object):
     def WaitForDevicePm(self):
       pass
 
+    def device(self):
+      return self._adb_device
+
   def __init__(self):
-    self.attached_devices = []
     self.shell_command_handlers = {}
+    self.attached_devices = []
 
     def AdbCommandsStubConstructor(device=None):
       return AdbCommandsModuleStub.AdbCommandsStub(self, device)