PrintSpooler: Remove recommendation if Play Store is not installed

Sympton:
If Play Store (com.android.vending) is not installed, printer
recommendation function which guides a user to Play Store is useless.

Root-cause:
Even if Play Store is not installed,
PrintSpooler tries to start an activity for market:// with package
names in Play Store.

Solution:
Hide printer recommendation UI and show "No print services enabled"
if there is no printer service.

Change-Id: I0b2eabbd57bc47c6382f53e610e33252ea359390