Make CompanionDeviceManager.apk to platform signed

Inorder to make CompanionDeviceMananger to be able to
get appInfo from non-0 profile we need to add
android.permission.INTERACT_ACROSS_USERS permission and
make CompanionDeviceManager.ap platform signed.

Fix: 215160795
Test: atest CtsCompanionDeviceManagerCoreTestCases
      atest CtsCompanionDeviceManagerUiAutomationTestCases
      atest CtsOsTestCases:CompanionDeviceManagerTest

Change-Id: I26cebadcdef05274436cd454b4d635d82eb2b7e2
diff --git a/packages/CompanionDeviceManager/AndroidManifest.xml b/packages/CompanionDeviceManager/AndroidManifest.xml
index 06f2d9d..8b5d214 100644
--- a/packages/CompanionDeviceManager/AndroidManifest.xml
+++ b/packages/CompanionDeviceManager/AndroidManifest.xml
@@ -31,6 +31,7 @@
     <uses-permission android:name="android.permission.RADIO_SCAN_WITHOUT_LOCATION"/>
     <uses-permission android:name="android.permission.QUERY_ALL_PACKAGES"/>
     <uses-permission android:name="android.permission.HIDE_NON_SYSTEM_OVERLAY_WINDOWS"/>
+    <uses-permission android:name="android.permission.INTERACT_ACROSS_USERS"/>
 
     <application
         android:allowClearUserData="true"