Fix permission issue with CTS tests for wallpaper

One additional test APK needs to be given READ_EXTERNAL_STORAGE
permission in order to access wallpaper bitmaps.

Bug: 63560864
Test: cts-tradefed run cts -m CtsDevicePolicyManagerTestCases
Change-Id: Ib610782941dca58c9673f810513ee9f4ed862cb1
diff --git a/hostsidetests/devicepolicy/app/DeviceAndProfileOwner/latest/AndroidManifest.xml b/hostsidetests/devicepolicy/app/DeviceAndProfileOwner/latest/AndroidManifest.xml
index 93c052f..0dc8bc3 100644
--- a/hostsidetests/devicepolicy/app/DeviceAndProfileOwner/latest/AndroidManifest.xml
+++ b/hostsidetests/devicepolicy/app/DeviceAndProfileOwner/latest/AndroidManifest.xml
@@ -23,6 +23,7 @@
     <uses-permission android:name="android.permission.DISABLE_KEYGUARD" />
     <uses-permission android:name="android.permission.INTERNET" />
     <uses-permission android:name="android.permission.MANAGE_ACCOUNTS" />
+    <uses-permission android:name="android.permission.READ_EXTERNAL_STORAGE" />
     <uses-permission android:name="android.permission.SET_WALLPAPER" />
     <uses-permission android:name="android.permission.MODIFY_AUDIO_SETTINGS" />