AndroidWorkload: Added unchangeable android permissions

Some android permissions are categorized as 'unchangeable' so we don't need to
try and set them.

wlauto/common/android/workload.py

@@ -26,7 +26,8 @@ from wlauto.core.resource import NO_ONE
 from wlauto.common.android.resources import ApkFile, ReventFile
 from wlauto.common.resources import ExtensionAsset, Executable, File
 from wlauto.exceptions import WorkloadError, ResourceError, DeviceError
-from wlauto.utils.android import ApkInfo, ANDROID_NORMAL_PERMISSIONS, UNSUPPORTED_PACKAGES
+from wlauto.utils.android import (ApkInfo, ANDROID_NORMAL_PERMISSIONS,
+                                  ANDROID_UNCHANGEABLE_PERMISSIONS, UNSUPPORTED_PACKAGES)
 from wlauto.utils.types import boolean, ParameterDict
 from wlauto.utils.revent import ReventRecording
 import wlauto.utils.statedetect as state_detector
@@ -446,6 +447,8 @@ class ApkWorkload(Workload):
             # "Normal" Permisions are automatically granted and cannot be changed
             permission_name = permission.rsplit('.', 1)[1]
             if permission_name not in ANDROID_NORMAL_PERMISSIONS:
+                # Some permissions are not allowed to be "changed"
+                if permission_name not in ANDROID_UNCHANGEABLE_PERMISSIONS:
                     # On some API 23+ devices, this may fail with a SecurityException
                     # on previously granted permissions. In that case, just skip as it
                     # is not fatal to the workload execution

wlauto/utils/android.py

@@ -103,6 +103,24 @@ ANDROID_NORMAL_PERMISSIONS = [
     'UNINSTALL_SHORTCUT',
 ]
 
+ANDROID_UNCHANGEABLE_PERMISSIONS = [
+    'USE_CREDENTIALS',
+    'MANAGE_ACCOUNTS',
+    'DOWNLOAD_WITHOUT_NOTIFICATION',
+    'AUTHENTICATE_ACCOUNTS',
+    'WRITE_SETTINGS',
+    'WRITE_SYNC_STATS',
+    'SUBSCRIBED_FEEDS_WRITE',
+    'SUBSCRIBED_FEEDS_READ',
+    'READ_PROFILE',
+    'WRITE_MEDIA_STORAGE',
+    'RESTART_PACKAGES',
+    'MOUNT_UNMOUNT_FILESYSTEMS',
+    'CLEAR_APP_CACHE',
+    'GET_TASKS',
+]
+
+
 # Package versions that are known to have problems with AndroidUiAutoBenchmark workloads.
 # NOTE: ABI versions are not included.
 UNSUPPORTED_PACKAGES = {