Add support for and use encrypted shared prefs

Adds support for saving shared preference files to the encrypted data
directory in the instrumentation test runner and VR Telemetry tests and
sets the VR shared preference files to use this new functionality.

Prerequisite Catapult change is at
https://chromium-review.googlesource.com/c/catapult/+/986951.

Bug: 826501
Change-Id: Ie51003fac40536c77b5814076ae67c4a153ed31d
Reviewed-on: https://chromium-review.googlesource.com/986926Reviewed-by: Sami Kyöstilä <skyostil@chromium.org>
Reviewed-by: Yaron Friedman <yfriedman@chromium.org>
Commit-Queue: Brian Sheedy <bsheedy@chromium.org>
Cr-Commit-Position: refs/heads/master@{#547902}

build/android/pylib/local/device/local_device_instrumentation_test_run.py

@@ -219,8 +219,9 @@ class LocalDeviceInstrumentationTestRun(
       @trace_event.traced
       def edit_shared_prefs(dev):
         for setting in self._test_instance.edit_shared_prefs:
-          shared_pref = shared_prefs.SharedPrefs(dev, setting['package'],
-                                                 setting['filename'])
+          shared_pref = shared_prefs.SharedPrefs(
+              dev, setting['package'], setting['filename'],
+              use_encrypted_path=setting.get('supports_encrypted_path', False))
           shared_preference_utils.ApplySharedPreferenceSetting(
               shared_pref, setting)
 

build/android/pylib/utils/shared_preference_utils.py

@@ -52,6 +52,7 @@ def ApplySharedPreferenceSetting(shared_pref, setting):
   {
     "package": "com.example.package",
     "filename": "AppSettingsFile.xml",
+    "supports_encrypted_path": true,
     "set": {
       "SomeBoolToSet": true,
       "SomeStringToSet": "StringValue",

chrome/android/shared_preference_files/test/vr_cardboard_skipdon_setupcomplete.json

@@ -2,6 +2,7 @@
   {
     "package": "com.google.vr.vrcore",
     "filename": "VrCoreSettings.xml",
+    "supports_encrypted_path": true,
     "set": {
       "VrSkipDon": true,
       "DaydreamSetupComplete": true,

chrome/android/shared_preference_files/test/vr_ddview_skipdon_setupcomplete.json

@@ -2,6 +2,7 @@
   {
     "package": "com.google.vr.vrcore",
     "filename": "VrCoreSettings.xml",
+    "supports_encrypted_path": true,
     "set": {
       "VrSkipDon": true,
       "DaydreamSetupComplete": true,

tools/perf/contrib/vr_benchmarks/shared_android_vr_page_state.py

@@ -64,8 +64,9 @@ class SharedAndroidVrPageState(shared_page_state.SharedPageState):
     """Configures VrCore using the provided settings file."""
     settings = shared_preference_utils.ExtractSettingsFromJson(filepath)
     for setting in settings:
-      shared_pref = self._platform.GetSharedPrefs(setting['package'],
-                                                  setting['filename'])
+      shared_pref = self._platform.GetSharedPrefs(
+          setting['package'], setting['filename'],
+          use_encrypted_path=setting.get('supports_encrypted_path', False))
       shared_preference_utils.ApplySharedPreferenceSetting(
           shared_pref, setting)