Easy app-installing for Guest users

Allows an admin user to selectively install packages into a Guest user
by displaying a list of available packages that are installed in the
admin, but not in the Guest, and letting the admin choose to copy those
apps to the Guest.

Test: atest SettingsLibTests:com.android.settingslib.users.AppCopyingHelperTest

Test: Manual: install some apps in user 0, create a guest, uninstall
some system apps from it. Now, open this panel. Request some of those
apps be installed in the Guest and verify it worked.

Bug: 193281439

Change-Id: I4e6874a4ee93cd7bba96e1f6c8d04ed95873c1a2
diff --git a/res/drawable/ic_apps.xml b/res/drawable/ic_apps.xml
index 20583a1..76ba829 100644
--- a/res/drawable/ic_apps.xml
+++ b/res/drawable/ic_apps.xml
@@ -17,7 +17,8 @@
         android:width="24dp"
         android:height="24dp"
         android:viewportWidth="24.0"
-        android:viewportHeight="24.0">
+        android:viewportHeight="24.0"
+        android:tint="?android:attr/colorControlNormal">
     <path
         android:pathData="M16,6C16,7.1 16.9,8 18,8C19.1,8 20,7.1 20,6C20,4.9 19.1,4 18,4C16.9,4 16,4.9 16,6ZM6,8C7.1,8 8,7.1 8,6C8,4.9 7.1,4 6,4C4.9,4 4,4.9 4,6C4,7.1 4.9,8 6,8ZM12.001,20C13.101,20 14.001,19.1 14.001,18C14.001,16.9 13.101,16 12.001,16C10.901,16 10.001,16.9 10.001,18C10.001,19.1 10.901,20 12.001,20ZM8.001,18C8.001,19.1 7.101,20 6.001,20C4.901,20 4.001,19.1 4.001,18C4.001,16.9 4.901,16 6.001,16C7.101,16 8.001,16.9 8.001,18ZM6.001,14C7.101,14 8.001,13.1 8.001,12C8.001,10.9 7.101,10 6.001,10C4.901,10 4.001,10.9 4.001,12C4.001,13.1 4.901,14 6.001,14ZM14.001,12C14.001,13.1 13.101,14 12.001,14C10.901,14 10.001,13.1 10.001,12C10.001,10.9 10.901,10 12.001,10C13.101,10 14.001,10.9 14.001,12ZM14.001,6C14.001,7.1 13.101,8 12.001,8C10.901,8 10.001,7.1 10.001,6C10.001,4.9 10.901,4 12.001,4C13.101,4 14.001,4.9 14.001,6ZM18,14C19.1,14 20,13.1 20,12C20,10.9 19.1,10 18,10C16.9,10 16,10.9 16,12C16,13.1 16.9,14 18,14ZM20,18C20,19.1 19.1,20 18,20C16.9,20 16,19.1 16,18C16,16.9 16.9,16 18,16C19.1,16 20,16.9 20,18Z"
         android:fillType="evenOdd"