Add GetSharedPrefs to Android platform

telemetry/telemetry/core/android_platform.py

Index: telemetry/telemetry/core/android_platform.py
diff --git a/telemetry/telemetry/core/android_platform.py b/telemetry/telemetry/core/android_platform.py
index 0cede02e5b3e43a651eee1ad2fd56f3db419c996..3d4dae504cd019c0e101a8127ae366914113d971 100644
--- a/telemetry/telemetry/core/android_platform.py
+++ b/telemetry/telemetry/core/android_platform.py
@@ -30,6 +30,24 @@ class AndroidPlatform(platform.Platform):
     """
     return self._platform_backend.GetSystemUi()
 
+  def GetSharedPrefs(self, package, filename):
+    """Retrieves a Devil SharedPrefs instance from the backend.
+
+    See devil.android.sdk.shared_prefs for the documentation of the returned
+    object.
+
+    Args:
+      package: A string containing the package of the app that the SharedPrefs
+          instance will be for.
+      filename: A string containing the specific settings file of the app that
+          the SharedPrefs instance will be for.
+
+    Returns:
+      A reference to a SharedPrefs object for the given package and filename
+      on whatever device this platform object refers to.
+    """
+    return self._platform_backend.GetSharedPrefs(package, filename)
+
   def IsSvelte(self):
     return self._platform_backend.IsSvelte()