Merge cherrypicks of [13391650, 13391541, 13390384, 13391212, 13390778] into rvc-qpr2-release

Change-Id: I931e82213d5ef58422f8dcd4980db4d6d0f9a1fb

Author: android-build-team Robot

core/res/res/values/required_apps_managed_device.xml

@@ -27,5 +27,6 @@
         <item>com.android.providers.downloads</item>
         <item>com.android.providers.downloads.ui</item>
         <item>com.android.documentsui</item>
+        <item>com.android.cellbroadcastreceiver</item>
     </string-array>
 </resources>