Ensure clock view is added in renderer.

When MIGRATE_KEYGUARD_STATUS_VIEW is off, we are not adding the clock
views to the root view.

Fixes: 	302528158
Test: Open wallpaper renderer with all migrate flags off and look at
preview.

Change-Id: I79ae2045939e2aead6c2c8adb5b0ba0e5b6f2380