[Android] Convert to DeviceUtils versions of IsOnline, HasRoot, and EnableRoot.

tools/memory_inspector/memory_inspector/backends/android/android_backend.py

Index: tools/memory_inspector/memory_inspector/backends/android/android_backend.py
diff --git a/tools/memory_inspector/memory_inspector/backends/android/android_backend.py b/tools/memory_inspector/memory_inspector/backends/android/android_backend.py
index 4bae745d171c7f72e388dc2c1a2c62dbac7b4ee7..4ab38e84da64568717c06fdfacd78011fd5f2217 100644
--- a/tools/memory_inspector/memory_inspector/backends/android/android_backend.py
+++ b/tools/memory_inspector/memory_inspector/backends/android/android_backend.py
@@ -26,6 +26,7 @@ from memory_inspector.core import symbol
 # The memory_inspector/__init__ module will add the <CHROME_SRC>/build/android
 # deps to the PYTHONPATH for pylib.
 from pylib import android_commands
+from pylib.device import device_errors
 from pylib.device import device_utils
 from pylib.symbols import elf_symbolizer
 
@@ -173,7 +174,11 @@ class AndroidDevice(backends.Device):
 
   def Initialize(self):
     """Starts adb root and deploys the prebuilt binaries on initialization."""
-    self.underlying_device.old_interface.EnableAdbRoot()
+    try:
+      self.underlying_device.EnableRoot()
+    except device_errors.CommandFailedError:
+      # Try to deploy memdump and ps_ext anyway.
+      pass
 
     # Download (from GCS) and deploy prebuilt helper binaries on the device.
     self._DeployPrebuiltOnDeviceIfNeeded(_MEMDUMP_PREBUILT_PATH,