Load Uri based shortcut drawable in LauncherApps

Bug: 143106625
Test: Manual test by publishing shortcuts with uri icons in a sample app
Test: atest com.android.server.pm.ShortcutManagerTest1 \
            com.android.server.pm.ShortcutManagerTest2 \
            com.android.server.pm.ShortcutManagerTest3 \
            com.android.server.pm.ShortcutManagerTest4 \
            com.android.server.pm.ShortcutManagerTest5 \
            com.android.server.pm.ShortcutManagerTest6 \
            com.android.server.pm.ShortcutManagerTest7 \
            com.android.server.pm.ShortcutManagerTest8 \
            com.android.server.pm.ShortcutManagerTest9 \
            com.android.server.pm.ShortcutManagerTest10

Change-Id: Ibfb3cf6f7dabdeed36b845ab6e026506978d972a